Answers
The way that Seon can rewrite his hypothesis to be a statement that will more likely be supported is option B. change the dependent variable to "If the angle at which the balloon is launched moves closer to 45 degrees
What is the hypothesis about?Seon could also design his experiment to test this new hypothesis by measuring the distance along the ground for different angles, starting at around 45 degrees and increasing up to 90 degrees. He could then analyze the data to see if the distance along the ground increases up to a certain point and then decreases beyond that point.
Therefore, A, C, and D are not appropriate rewrites of the hypothesis as they don't take into account the findings that the distance along the ground began to decrease again when the angle reached about 45 degrees. B is a better option as it takes into account that the distance along the ground will increase as the angle moves closer to 45 degrees and decrease as it moves beyond that point.
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See transcribed text below
For a final project in Seon's physics class, students were instructed to build a water balloon launcher, write a hypothesis, and then carry out an experiment with the launcher. Considering that 90 degrees means launching the balloon straight up into the air and 0 degrees means launching it straight along the ground, Seon first wrote the hypothesis below.
If the angle at which the balloon is launched decreases from 90 degrees, then the distance that the balloon goes along the ground will increase, because more energy will go into pushing the balloon forward than upward.
Seon found that this was true until the angle reached about 45 degrees, and then the distance along the ground began to decrease again. Seon knows that he will need to write a new explanation, but he would like to conduct an experiment that is based on his original
Mark this and return
How could Seon rewrite his hypothesis to be a statement that will more likely be supported?
A. change the independent variable to "If the angle at which the balloon is launched increases up to 90 degrees
B. change the dependent variable to "If the angle at which the balloon is launched moves closer to 45 degrees
C. change the independent variable to "If the angle at which the balloon is launched moves closer to 45 degrees...
D. change the dependent variable to "If the angle at which the balloon is launched increases to 90 degrees.
Related Questions
A 13000 kg truck initially moving at a constant speed of 127/km/h suddenly applies brakes and stops in 13m. How much work has been done on the truck over this distance?
Answers
1,647,530 J work has been done on the truck over this distance.
The work done on the truck over this distance can be calculated using the equation W = Fs, where W is the work, F is the force, and s is the distance.
W = (13000 kg) x (9.81 m/s2) x (13 m)
W = 1,647,530 J
What is work done?
Work done is a term used to describe the amount of energy transferred or converted from one form to another. It is typically measured in joules (J) and is the product of a force applied to an object over a certain distance. Work done can be used to calculate the amount of energy expended by a system, such as a machine or engine.
Therefore, 1,647,530 J work has been done on the truck over this distance.
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If a light ray from a candle strikes a mirror at an angle of 40° with the normal, at what angle will the ray reflect? a. 20° b. 25° c. 40° d. 60° e. 80°
Answers
The ray of light reflects at an angle of 40° from the mirror.
In brief:The angle of incidence of a ray of light should be equal to the angle of reflection as is stated by the first law of reflection. That is the reason why the ray from the candle reflect at 40° which is equal to the angle of incidence.
What is reflection?The bouncing back of light from a smooth surface is called reflection.
What is angle of incidence?The angle at which a ray of light is incident on a surface or strikes a surface is called angle of incidence.
What is angle of reflection?The angle at which a ray of light reflects from a smooth surface after its incidence is called angle of reflection.
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how does changing the frequency affect the wavelength
Answers
As the frequency of the wave increases, the wavelength decreases, and as the frequency of the wave decreases, the wavelength increases.
The relationship between the frequency, wavelength, and velocity of a sound wave is described by the equation: v = fλ
Where v is the velocity of the wave, f is the frequency of the wave, and λ is the wavelength of the wave. This means that if the frequency of a sound wave is doubled, the wavelength will be halved, and if the frequency of a sound wave is halved, the wavelength will be doubled.
It's important to note that this relationship is valid as long as the medium through which the wave is traveling remains constant. If the medium changes, the velocity of the wave will change as well and the relationship will change accordingly.
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What does a horizontal line on a position vs time graph mean?
Answers
A horizontal line on a position vs time graph mean that an object is not moving.
An item that is not moving or has a constant velocity is represented by a horizontal line on a position vs. time graph. A horizontal line indicates that there is no change in an object's position with regard to time. When an item is moving at rest, its velocity is 0 since the slope of a horizontal line is zero.
An item that is not moving would be represented by a horizontal line on a position vs. time graph that is straight and parallel to the x-axis. The item is moving but at a constant speed if the line is not travelling in a straight line along the x-axis.
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what causes a pot to boil over when lid is placed on top of it
Answers
A pot boils over when the lid is placed on top of it because of the build-up of pressure and steam inside the pot. This can cause the liquid in the pot to overflow, spilling out onto the stove or surrounding area.
When a pot of liquid is heated, the temperature of the liquid increases and the liquid begins to boil. As the liquid boils, steam is produced and rises to the surface of the liquid.
If a lid is placed on top of the pot, the steam is trapped inside, building up pressure inside the pot. The pressure can cause the liquid in the pot to overflow, spilling out onto the stove or surrounding area.
In addition to the build-up of pressure, there are several other factors that can contribute to a pot boiling over. For example, if the pot is too full, the liquid can overflow even without a lid.
Similarly, if the pot is not level or is on an uneven surface, this can cause the liquid to boil over. Additionally, stirring the liquid in the pot can create turbulence that can cause the liquid to boil over.
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Why is positive charge at higher potential?
Answers
The convention of electric fields is used to designate the words "high potential" and "low potential" to the terminals of a battery Its foundation is the motion of a tiny positive "test charge" in the presence of an electric field.
The physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them, is known as an electric field (also known as an E-field[1]). [2] It can also refer to a system of charged particles' physical field. [3] Electric charges and time-varying electric currents are the building blocks of electric fields The electromagnetic field, one of the four basic interactions (also known as forces) of nature, manifests itself in both electric and magnetic fields Electrical technology makes use of electric fields, which are significant in many branches of physics. For instance, in atomic physics and chemistry, the electric field acts as an attracting force to hold atoms' atomic nuclei and electrons together. Additionally it is the force in charge of
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A ball is thrown horizontally with an initial velocity of 20 m/s from the top of a tower 60 m high.
Answers
The final velocity of the ball thrown horizontally at a distance of 60 m high is 39.7 m/s
The initial velocity of the ball = 20 m/s
The distance traveled by the ball = 60 m
The final velocity of the ball can be found using the formula,
v² = u² + 2ax
where v is the final velocity of the ball
u is the initial velocity of the ball
a is the acceleration due to gravity
x is the distance traveled by the ball
Let us substitute the known values in the above equation, we get
v² = 20² + 2 x 9.8 x 60
= 400 + 1176
= 1576
v = √1576
= 39.7 m/s
Therefore, the final velocity of the ball is 39.7 m/s
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you are handed an opaque, soft rod. in the lab you pull on the ends of the rod. it does not takes a lot of force to get it to start to stretch. when it stretches out it forms a very nice wire, which does not conduct heat very well. what is the likely class of solid material of your rod?
Answers
The likely class of solid material of the rod is a polymer, such as rubber or plastic. These materials are known for their flexibility and ability to stretch when a force is applied, and they do not conduct heat well.
A polymer is a type of material made up of long chains of repeating molecules, also known as monomers. These materials have a wide range of properties, but they are generally characterized by their flexibility and ability to stretch when a force is applied. This is because the polymer chains can slide past one another, allowing the material to be deformed without breaking.
When a force is applied to a polymer, the chains will stretch, causing the material to elongate. The force required to do this is usually relatively low compared to other types of materials. This is known as the polymer's tensile strength, and it is one of the key properties that make polymers useful in a wide range of applications.
Polymers are poor heat conductors because the thermal energy is not conducted efficiently through the long polymer chains. The heat has to be conducted through the weak weak van der Waals interactions between the polymer chains.
In summary, The rod you are handed is a polymer, which is a type of material that is known for its flexibility and ability to stretch when a force is applied and does not conduct heat well.
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Is kinetic energy always positive or zero?
Answers
Kinetic energy must always have a positive value. While velocity can have either a positive or negative number, velocity squared always has a positive value.
Kinetic energy is not a vector and cannot be squared (KE = 1/2*m*v2). The mass should be expressed in kilograms (kg) and the velocity in meters per second (m/s) in SI units. The mass should be expressed in pound mass (lbm) or slug, and the velocity in feet per second (ft/sec). Kinetic energy is always positive since it is based on motion. If an item is not in motion, its kinetic energy is 0. Kinetic energy has no negative value. Kinetic energy is defined as one-half of the mass multiplied by the velocity squared (KE = 1/2*m*v2).Kinetic energy must always have a negative or positive value. While velocity can have either a positive or negative number, velocity squared always has a positive value.
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If 0, point, 035, p, c,0. 035pc of charge is transferred via the movement of a, l, start superscript, 3, plus, end superscript,alx 3+ ions, how many of these must have been transferred in total?.
Answers
The total number of [tex]Al^{+3}[/tex] ions (aluminum cations) needed to b transferred in the current is 72917 using principles of electrochemistry.
Total charge transferred is given to be [tex]0.035\\[/tex] [tex]pC[/tex].
Since, [tex]1 p C = 1[/tex] × [tex]10^{-12}[/tex] [tex]C\\[/tex]
Total Charge ([tex]Q[/tex]) = [tex]0.035[/tex] × [tex]10^{-12}[/tex] [tex]C[/tex]
Charge on each aluminum cation [tex]Al^{+3}[/tex] = Total charge of extra protons contained in each aluminum cation.
Charge on a single proton = [tex]1.6[/tex] × [tex]10^{-19}[/tex] [tex]C[/tex]
Extra protons on each aluminum cation ([tex]Al^{+3}[/tex]) = [tex]3[/tex]
Thus charge on each aluminum cation ([tex]Al^{+3}[/tex]) = [tex]3[/tex] × [tex]1.6[/tex] × [tex]10^{-19}[/tex]
Now let the total number of aluminum cations ([tex]Al^{+3}[/tex]) be [tex]n[/tex].
Thus according to principles of electrochemistry:
[tex]n[/tex] × [tex]3[/tex] × [tex]1.6[/tex] × [tex]10^{-19}[/tex] = [tex]0.035[/tex] × [tex]10^{-12}[/tex]
Solving the equation for [tex]n[/tex], we get [tex]n[/tex] = [tex]72917[/tex]
Thus, in total 72917 ions of [tex]Al^{+3}[/tex] are needed to be transferred in the current.
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The correct question should be:
If 0.035pC of charge is transferred via the movement of Al3+ ions, how's many of these must be transferred in total?
The blue curve is the plot of the data. The straight orange line is tangent to the blue curve at t = 40 s. A plot has the concentration of A in molar on the y axis and time in seconds on the x axis. A curve contains the points (0, 0. 52), (20, 0. 43), (40, 0. 35), (60, 0. 29), (80, 0. 24), and (100, 0. 20). A line touches the curve at (40, 0. 35) and has a y intercept of (0, 0. 48). Approximate the instantaneous rate of this reaction at time t = 40 s
Answers
According to the question,The instantaneous rate of this reaction at t = 40 s is approximately -0.07 molar/s.
What is the reaction ?
The reaction is the way a person reacts to a situation, event, or stimulus. It is often a combination of emotional, mental, and physical responses. Reactions can be positive, negative, or a combination of both. Positive reactions may include feeling joy or excitement, while negative reactions may include fear, anxiety, or sadness. Depending on the situation, reactions can vary significantly from person to person. Ultimately, the reaction to any given situation is a reflection of an individual's beliefs, values, and experiences.
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you help abuddy lift a 100 kg piano to the third floor of a house, 10 m off the ground.
How much work do you have to do? 100 J
10000 J
1000 J
10 J
50J
You push a frictionless cart and do some amount of work. The work you do when pushing the same cart twice as far while applying twice the force is
half as much.
twice as much
four times as much
the same amount.
We need to eat food to replenish our fat/energy stores. What happens if you do more work than energy you consume in food?
You lose weight
You gain weight
You can do no more work than you consume or you will instantly die.
Impossible!
You need to drink some zero calorie water.
Answers
Answer:
1So the amount of work you have to do to lift the piano is about 98000 J.
2Therefore, the work done will be four times as much.
3 lose weight
Explanation:
The amount of work you have to do to lift a 100 kg piano to the third floor of a house, 10 m off the ground, can be calculated using the equation for work done by a force, W = F * d * cos(Θ), where F is the force applied, d is the displacement, and Θ is the angle between the force and the displacement.
Since the piano is being lifted vertically, the angle between the force and the displacement is 0°, so cos(Θ) = 1.
The force required to lift the piano is equal to the gravitational force acting on the piano, which can be calculated as F = m * g, where m is the mass of the piano and g is the acceleration due to gravity (approximately 9.8 m/s^2).
Substituting the values:
W = F * d * cos(Θ)
W = (100 kg) * (9.8 m/s^2) * (10 m) * (1)
W = 980 N * 10 m = 98000 J
So the amount of work you have to do to lift the piano is 98000 J.
thats the first one
second one
The work you do when pushing a frictionless cart twice as far while applying twice the force is four times as much.
The amount of work done, W, can be calculated using the equation W = F * d, where F is the force applied and d is the displacement.
If you push the cart twice as far while applying twice the force, the displacement will be twice as much and the force will be twice as much, so:
W = F * d = (2 * F) * (2 * d) = 4 * (F * d)
Therefore, the work done will be four times as much.
and third one
If you do more work than the energy you consume in food, you will lose weight.
When you do work, you use energy stored in your body, such as the energy stored in fat. If you consistently use more energy than you consume through food, your body will have to draw on its energy stores to maintain your daily activities, and you will lose weight as a result.
On the other hand, if you consume more energy than you use, your body will store the excess energy as fat, leading to weight gain.
It is not possible to instantly die from doing more work than the energy you consume in food, but it is important to maintain a balanced diet and regular physical activity to maintain good health. Drinking zero calorie water will not directly affect your weight or energy stor
Please help on all the questions I will post 50 points each
Answers
Answer:
The answer is 8.0 J.
Answer:
Explanation:
The answer is A :)
have a nice day
after one second, about how fast, in meters per second, is the ball traveling in m/s if we neglect the effect of air resistance?
Answers
In free fall, an object develops under the influence of gravitational force only. The only boosting is the acceleration of gravity 'g'. None of the other force, including air resistance, is drama on such an object.
interestingly, an object in free fall does not certainly need to be falling (that is, moving downwards).
For example, the Moon's motion smug all of the conditions listed above: there is no other force acting on it other than gravity (it is being pulled towards the Earth), and there is no air resistance, as there is no air in space.
By the definition of velocity, we can find the velocity of a falling object is:
v=v0 +gt
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Please find the Work done given the graphs of an event.
I need help please!
Answers
The total work done by the object in the graph is 1,000 J.
What is the work done by the object?
The work done by the object is the area under the force - displacement graph.
The area of the curve will be determined from the following points;
Area of rectangle from 0 m to 5 mArea of trapezium from 5 m t0 10 mArea of rectangle from 10 m to 15 mArea of rectangle from 15 m to 20 mThe area of rectangle from 0 m to 5 m is calculated as;
A₁ = ( 40 N ) x ( 5 m ) = 200 J
The area of trapezium from 5 m to 10 m is calculated as;
A₂ = ¹/₂ ( 40 N + 80 N ) x ( 5 m )
A₂ = 300 J
The area of rectangle from 10 m to 15 m is calculated as;
A₃ = ( 80 N ) x ( 5 m )
A₃ = 400 J
The area of rectangle from 15 m to 20 m is calculated as;
A₄ = ( 20 N ) x ( 5 m )
A₄ = 100 J
The total work done by the object is calculated as;
W = 200 J + 300 J + 400 J + 100 J
W = 1,000 J
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Which two elements would NOT be capable of forming an ionic
bond?
a phosphorus and chlorine
b barium and nitrogen
c iodine and sodium
d. calcium and oxyge​n
Answers
The formation of an ionic bond with phosphorus and chlorine is not conceivable.
As a result, option (a) is correct.
What is an ionic bond?The unique chemical bonds created by the sharing of electrons are known as ionic bonds. The two groups of elements that are unable to create an ionic bond are chlorine and phosphorus.
A metal and a non-metal form ionic bonds to create an electrovalent combination.
Covalent bonds are those formed between non-metals.
Metallic bonds are the bonds that connect metals.
In addition, neither phosphorus nor chlorine is metal
An electropositive metal gives up electrons to create an ionic connection.Through this process, they acquire a positive charge.The extremely electronegative nonmetal picks up electrons and develops a negative charge.Ionic bonding is produced by the electrostatic attraction between the two species that have opposing charges.Thus, we might draw the conclusion that the development of an ionic link between phosphorus and chlorine is not conceivable.To learn more about the ionic bond refer to:
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Write down ONE reason why this graph demonstrates that the component being tested is a diode.
Answers
A diode has a very high resistance in one direction. This means that current can only flow in the other direction.
if you were looking at two objects, one 50 cm from the pinhole and one 75 cm from the pinhole, which object would be in 'focus' on the screen?
Answers
The object 50 cm from the pinhole would be in focus on the screen.
Objects at different distances from the pinhole will produce different images on the screen. This is because the light traveling from the object to the pinhole is diverging and the light rays will converge at different points on the screen.
The object at 50 cm from the pinhole will produce an image that is in focus on the screen, as the rays from the object will converge at the same point. The object at 75 cm from the pinhole will produce an image that is not in focus, as the rays will not converge at the same point.
This is because the rays have diverged more by the time they reach the pinhole, so the image produced will be blurry.
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How do can you tell the difference between an applied force pulling a box an a tension pulling a box?
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Applied force pulling a box is when an outside force pushes at the surface of the box to move it on the surface. The friction provided by the surface acts as the opposing force, and the side on which the person is pushing becomes the normal to which all the calculations are made.
The equation to solve these problems can be:
Force = mass ×acceleration
Tension pulling a box is when an outside force pulls on the box, for example, a rope pulling a box. The friction provided by the surface acts as the opposing force. The side on which the tension is being applied becomes the normal to which all calculations are made.
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On the dot below, which represents the book, draw and label the forces (not components)
the lowest point of its circular path. Each force must be represented by a distinct arrow stam
away from, the dot.
Answers
The dot represents the book and the forces that act on it are gravity, normal force and centripetal force.
Centripetal forceGravity is the force that pulls the book down towards the earth and is represented by an arrow pointing downwards away from the dot.The normal force is the force that acts perpendicular to the surface the book is on, and is represented by an arrow pointing outwards away from the dot.Lastly, the centripetal force is the force that pulls the book towards the center of its circular path, and is represented by an arrow pointing towards the center of the circle away from the dot.All of these forces act on the book and thus must be drawn in order to accurately represent the book's motion.The dot below represents the book, which is undergoing circular motion. There are two forces acting on it, centripetal force and gravitational force.The centripetal force is the force directed towards the centre of the circle, while the gravitational force is the force of gravity acting on the book due to its mass. Both of these forces can be represented by arrows pointing away from the dot.The centripetal force is represented by an arrow pointing inwards, towards the centre of the circle. The gravitational force is represented by an arrow pointing downwards, towards the ground. Both of these forces are acting on the book at the lowest point of its circular path.The centripetal force is responsible for keeping the book in its circular path, while the gravitational force is responsible for pulling the book down. The combination of these two forces ensures that the book stays in its circular motion.To learn more about centripetal force refer to:
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imagine pushing a chair across the floor. the forces acting on the chair are the force of gravity exerted by earth, the normal force exerted by the floor, you pushing the chair, and friction from the floor opposing the motion. what is the underlying cause of the friction force exerted on the chair by the floor? choose 1 answer: choose 1 answer:
Answers
The underlying cause of the friction force exerted on the chair by the floor is caused by the floor opposing the motion.
Friction is created whenever two surfaces come into contact with one another. In this case, friction operates counter to the motion. What constitutes friction is determined by the nature of the materials used for the two surfaces. Rougher surfaces create more friction.
There are three main causes of friction:
Adhesion: is the molecular force that happens when two materials come into close contact.Roughness of the surface: When two rough surfaces come into touch with one another, they produce frictional force or an opposing force, which can occasionally be turned into heat.Body deformation: Friction may be caused by body deformations or the deformation of the body surface that is in touch with another body while in motion.To learn more about friction, click here:
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Suppose a cat elimbs a tree to a height of 2 meters. If the cat doubles its height to 4
meters, its potential energy will
Answers
Imagining a cat ascending a tree to a height of two meters The cat's potential energy will double if its height doubles to 4 meters.
What is the straightforward meaning of potential energy?Potential energy is a type of energy that can be stored but is reliant on the interactions of various system elements. Its potential energy rises when a spring is compressed or stretched.
The energy that is held within a system or object due to its position or component configuration is known as potential energy. Outside factors like air pressure or altitude have no effect on the object or system. The energy of moving particles within a system or an object, on the other hand, is referred to as kinetic energy.
PE = mgh
If h doubles PE = mg2h
PE = 1×1×2
PE = 2
So potential energy will doubles.
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the period of oscillation of a spring and mass system is 0.54 seconds and the amplitude is 4.900 cm. what is the magnitude of acceleration at the point of maximum extension of the spring
Answers
Simple harmonic motion is defined as a motion in which the restoring force is directly proportional to the displacement of the body from its mean position.
Define period of oscillation?The time taken for an oscillating particle to complete one cycle of oscillation is known as the Period of oscillating particle.Period is the time taken by the particle for one complete oscillation. It is denoted by T. The frequency of the oscillation can be obtained by taking the reciprocal of the frequency.The time period of a simple pendulum: It is defined as the time taken by the pendulum to finish one full oscillation and is denoted by “T”. The amplitude of simple pendulum: It is defined as the distance travelled by the pendulum from the equilibrium position to one side.Oscillation is defined as the process of repeating variations of any quantity or measure about its equilibrium value in time. Oscillation can also be defined as a periodic variation of a matter between two values or about its central value.
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used to express the mass of atomic and subatomic particles
Answers
Atomic Mass Unit used to express the mass of atomic and subatomic particles
What is Atomic Mass Unit?Atomic mass unit (amu) is a unit of mass that is used to express the mass of atomic and subatomic particles. It is defined as one twelfth of the mass of carbon-12 atom and is equal to 1.66 x 10^-27 kg.
It can also used to express the mass of molecules and other chemical compounds. The amu is convenient unit for expressing relative masses of particles because it is much smaller than kilogram and can be easily converted to other units of mass, such as the Electronvolt (eV) and the Dalton (Da).
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Wave with 1cm Crest 1cm through and 2cm wavelength
Answers
We can determine the
of a wave when given the frequency and the wavelength.
• amplitude
• velocity
•equilibrium
•crest
Answers
We can determine the velocity of a wave when given the frequency and the wavelength.
What are the effects of wavelength on velocity?
The velocity of the wave is said to be obtained by multiplying the wavelength by the wave's frequency for any wave. The wave velocity formula mathematically provided this formula. An increase in frequency will result in an increase in the wave's velocity for a constant wavelength.
How does wavelength change affect velocity?
The wave's velocity doesn't change. Therefore, the wave's new wavelength is half of its previous one. Consequently, a wave's wavelength shrank as its frequency rose.
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a ladybug sits at the outer edge of a record player which is spinning clockwise, and a gentleman bug sits halfway between her and the axis of rotation. the record player makes 33 1/3 revolutions every 1 minute. the gentleman bug's angular acceleration is
Answers
The ladybug and gentleman bug are both experiencing angular acceleration due to the rotation of the record player.
Angular acceleration is the rate of change of angular velocity, or the change in the speed of rotation over time.
The ladybug is sitting at the outer edge of the record player, so it has a larger radius and therefore a larger angular velocity than the gentleman bug, which is sitting halfway between the ladybug and the axis of rotation.
However, the gentleman bug is closer to the axis of rotation and therefore has a smaller angular acceleration.
In this scenario, the record player is making 33 1/3 revolutions every minute, which means it has an angular velocity of 33 1/3 radians per minute.
The ladybug, being at the outer edge, has a larger angular velocity than this, while the gentleman bug has a smaller angular velocity.
The angular acceleration of the gentleman bug is not given in the question, so it can't be determined from the information provided.
In conclusion, the ladybug and the gentleman bug have different angular velocities due to their different positions on the record player, and the gentleman bug's angular acceleration can't be determined without further information.
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Joe throws a 4 kg stone straight up and it reaches a height of 5 m. What is is GPE at is highest point?
Answers
Joe launches a 4 kg boulder upward and, and it soars 5 m in the air. At its tallest point, what is the stone's GPE? 2 m. How high must you lift a 5.
Describe GPE?Result for an image Describe the GPE.
The mass and position of an object affect its gravitational potential energy (GPE). It is equivalent to the effort required to move an object against the pull of gravity. GPE equals (mass) x g x (height) An item loses its gravity potential energy when it falls.
How come GPE?Result for an image Describe the GPE.
The energy that an object has due to its location in a gravitational field is known as gravitational potential energy. For an object close to the surface of Earth, gravitational force is most frequently used to.
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Joe launches a 4 kg boulder upward and, and it soars 5 m in the air. At its tallest point, what is the stone's GPE? 2 m. How high must you lift a 5.
Describe GPE?The mass and position of an object affect its gravitational potential energy (GPE). It is equivalent to the effort required to move an object against the pull of gravity. GPE equals (mass) x g x (height) An item loses its gravity potential energy when it falls.
How come GPE?The energy that an object has due to its location in a gravitational field is known as gravitational potential energy. For an object close to the surface of Earth, gravitational force is most frequently used to.
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snow is falling vertically at a constant speed of 7.8 m/s. a) at what angle from the vertical and b) with what speed do the snowflakes appear to be falling, as viewed by the driver of a car traveling on a straight road with a speed of 55 km/h?
Answers
The angle and the speed of snowflakes as viewed by the driver are:
a) -28.65°
b) 15.3 m/s
a) The angle at which the snowflakes appear to be falling, as viewed by the driver of a car, is equal to the angle between the vertical and the relative velocity of the snowflakes with respect to the car. This relative velocity can be calculated using vector addition:
v_rel = v_snow - v_car
where:
v_rel = relative velocity of the snowflakes with respect to the car
v_snow = vertical velocity of the snowflakes = 7.8 m/s (downwards)
v_car = velocity of the car = 55 km/h = (55 x 1000) / (60 x 60) = 15.28 m/s (horizontally)
The angle between the relative velocity and the vertical can be calculated using the tangent function:
tan(θ) = v_rel_y / v_rel_x
where:
θ = angle between the relative velocity and the vertical
v_rel_y = vertical component of the relative velocity = v_snow - v_car_y
v_rel_x = horizontal component of the relative velocity = -v_car_x
Substituting the values, we get:
tan(θ) = (7.8 m/s - 0 m/s) / (-15.28 m/s) = -0.51
θ = arctan(-0.51) = -28.65°
So the snowflakes appear to be falling at an angle of approximately -28.65° from the vertical, as viewed by the driver of the car.
b) The speed with which the snowflakes appear to be falling can be calculated using the Pythagorean theorem:
v_rel = sqrt(v_rel_x^2 + v_rel_y^2)
Substituting the values, we get:
v_rel = sqrt((-15.28 m/s)^2 + (7.8 m/s - 0 m/s)^2) = sqrt(233.4 m^2/s^2) = 15.3 m/s
Therefore, the snowflakes appear to be falling with a speed of approximately 15.3 m/s, as viewed by the driver of the car.
Therefore, The angle and the speed of snowflakes as viewed by the driver are:
a) -28.65°
b) 15.3 m/s
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In training for a triathlon, yuna swam 1. 9 miles in the open ocean, which took her 2 hours. For the first part of her swim, she averaged 1. 4 miles per hour. For the second part of her swim, she swam against the current and started to tire, so her average speed decreased to 0. 8 mph.
Answers
At a certain average speed, in first part and second part of her swim she took a total time of, Time = Time at 1.4 mph + Time at 0.8 mph.
Given that Yuna swam 1.9 miles in the open ocean, which took her 2 hours and for the first part of her swim, she averaged 1.4 miles per hour and She swam against the current for the second portion of her swim and began to tire, which caused her average speed to drop to 0.8 mph.
We can calculate the time she spent swimming at the average speed of 1.4 mph and the time she spent swimming at the average speed of 0.8 mph using the formula:
Distance = Speed x Time
For the first part of her swim, she swam at an average speed of 1.4 mph, so we can calculate the time spent swimming at this speed by:
Time = Distance / Speed
Time = 1.9 miles / 1.4 mph
For the second part of her swim, she swam at an average speed of 0.8 mph, so we can calculate the time spent swimming at this speed by:
Time = Distance / Speed
Time = (1.9 miles - Distance at 1.4 mph) / 0.8 mph
We can also calculate the total time spent swimming by adding the time spent swimming at each speed.
Time = Time at 1.4 mph + Time at 0.8 mph
Knowing the time spent swimming at each speed and the distance will help us determine the different factors that might have caused her to slow down.
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Question - In training for a triathlon, yuna swam 1. 9 miles in the open ocean, which took her 2 hours. For the first part of her swim, she averaged 1. 4 miles per hour. For the second part of her swim, she swam against the current and started to tire, so her average speed decreased to 0. 8 mph. Now, calculate the total time in swimming for the fist part and second part combine.