The correct statement about the sun, moon, and stars are the option A, B, and D. Those are: (a) appear to move each day because the Earth rotates, (b) rise north or south of east and set north or south of west, depending on their location on the celestial sphere, and (d) change their relative positions over time
What are the effects of the Earth's rotation?The rotation of Earth within its own axis, and also changes in the orientation of the rotation axis in space. One rotation of the Earth is in 24 hours. This condition affect the Sun and the Moon, as follow:
- As the Earth rotates from west to east, the Sun appears to rise in the east and set in the west. (option b is correct)
- Just one part of the Earth that faces the Sun is alight and thus experiences day; the part of the Earth that does not face the Sun experiences night.
→ So, the Sun, Moon, and Stars seem to change their relative positions over time (option d is correct) and appear to move each day because the Earth rotates (option a is correct)
→ Therefore, the Sun, Moon, and Stars are not appear in the same location in the sky (option c is incorrect)
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A 70 kg human sprinter can accelerate from rest to 10 m/s in 3. 0 s. During the same time interval, a 30 kg greyhound can accelerate from rest to 20 m/s.
Power is said to be the rate of completion of work. The average power for the first and second cases will be 1166.7 watts and 2000 watts, respectively.
Power explanation?
Power is a term used to describe how quickly work is completed. The SI unit it uses is the watt. Another way to measure power is in terms of horsepower. Mathematically, it can be calculated by dividing the overall work done by the overall time the body spent doing it.The average sprinting power of a human is as follows:Power equals E/t.P = 1/2mv² - 0/ΔtP = 1/2(70)(10)² - 0/3P = 1166.7 WattThe average power of the greyhound is listed as,P = 1/2mv²- 0/ΔtP = 1/2(30)(20)² - 0/3P = 2000Watt.
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A 70 kg human sprinter can accelerate from rest to 10 m/s in s. During the same time interval, a 30kg greyhound can go from rest to 20 m/s. What is the average power output of each? The average power over a time interval is Δt is ΔE÷Δt
Where potential energy is maximum?
Potential energy is maximum when the height of an object is maximum. Potential energy is the energy stored by an item as a result of its location relative to other objects.
internal tensions, electric charge, or other reasons. [The gravitational potential energy of an item, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field are all examples of common forms of potential energy. The joule, denoted by the sign J, is the unit of energy in the International System of Units Although it has connections to Greek philosopher Aristotle's notion of potentiality, the word potential energy was coined by the 19th-century Scottish engineer and physicist William Rankine. Potential energy is related with forces acting on a body in such a way that the total work is increased.
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What happens to kinetic energy at 0K?
At absolute zero, or 0 K, a molecule's kinetic energy is not zero. The molecule's entropy is zero at absolute zero (K), resulting in zero kinetic energy.
At absolute zero, molecules have no kinetic energy, in accordance with the Kinetic Molecular Theory. Without kinetic energy, molecules cannot move in translation. But even at absolute zero, all particles have a zero-point energy, according to quantum mechanics.
When a substance is cooled to absolute zero, the molecules' kinetic energy significantly decreases, which causes the molecules to slow down and start to group together.
The process of cooling entails taking away a body's heat energy.The system's thermal energy is increased by heat.The molecules get additional kinetic energy as heat is supplied.Their mobility increased as a result.The particles slow down as the heat is removed.To know more about kinetic energy
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The y -component of the electric field of an electromagnetic wave traveling in the x direction through vacuum obeys the equation ey=(375n/c)cos[kx−(2.20×1014rad/s)t] . ( c=3.0×108m/s ) what is the largest that the x -component of the wave can be?
The largest that the x-component of the wave can be is zero.
As the electromagnetic wave is traveling in the x direction and the y-component of the electric field is given, it means that there is no x-component of the electric field.
An electromagnetic wave is a transverse wave, which means that the oscillations of the electric and magnetic fields are perpendicular to the direction of propagation of the wave.
ln this case, the wave is traveling in the x direction, and the equation for the y-component of the electric field is given.
This means that the oscillations of the electric field are in the y direction and not in the x direction.
Therefore, it can be inferred that there is no x-component of the electric field in this wave. Since the x-component of the electric field is zero, it means that the largest that it can be is zero.
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A standard dipstick urinalysis includes specific gravity.a. Trueb. False
A standard dipstick urinalysis that includes specific gravity is a A) true statement.
Doctors use dipsticks made from color-sensitive pads. The color of the dipstick tells the donor the specific gravity of the urine. The dipstick test gives only rough results. Your doctor may send a urine sample to a laboratory for more accurate results. Here's what the dipstick test can tell you:
Acidity or pH. If your acid is abnormal, you may have kidney stones, a urinary tract infection (UTI), or another condition. protein. Urine-specific gravity is generally considered normal in the range of 1.005 to 1.030. 1.001 is normal if you drink a lot of water. Readings above 1.030 may be normal if you avoid drinking liquids
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A 60-kilogram student jumps down from a laboratory counter. At the instant he lands on the floor, his speed is 3 meters per second. If the student stops in 0. 2 seconds, what is the average force on the student?.
The average force on that student is 900N. It is determine by Newton's second law of motion.
How to find the average force on that student?Because the student start from static condition, we can determine it as the student initial velocity (v) = 0 m/s. based on Newton's second law of motion, the resultant force acting on the body and is in the same direction is the same as the rate of change of momentum of a body that is written as formula as follow:
F = ΔP : t
F = [tex]\frac{m(v-u)}{t}[/tex]
As per data given, speed (u) = 3m/s, mass (m) = 60 Kg, and student stop (t) = 0.2 s. The calculation of the average force will be:
F = [tex]\frac{m(v-u)}{t}[/tex]
F = [tex]\frac{60( 3 - 0)}{0.20}[/tex]
F = 900 N
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Hurry pls!!!!! Where on the ocean floor will you find the greatest amount of living organisms?
Answer: The majority of marine organisms are found in coastal areas.
Explanation: As opposed to the open ocean or deep water habitats. Coastal areas receive more sunlight and are usually warmer than open ocean or deep water habitats.
what device was used to measure the magnetic field intensity, allowing scientists to study the magnetic properties of rocks?
Mineral magnetism an instrument frequently used to measure magnetic hysteresis is a vibrating sample magnetometer. The study of the magnetic characteristics of rocks, sediments, and soils is known as rock magnetism.
Paleomagnetism's desire to comprehend how rocks preserve the Earth's magnetic field gave rise to the field.
The investigation of rock magnetism. An instrument frequently used to measure magnetic hysteresis is a vibrating sample magnetometer. The study of the magnetic characteristics of rocks, sediments, and soils is known as rock magnetism. Paleomagnetism's desire to comprehend how rocks preserve the Earth's magnetic field gave rise to the field.
When magnetic minerals occur in rocks, they can record the strength and direction of the magnetic field.
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which food has the lowest energy density? fried green tomatoes sun-dried tomatoes jarred tomato pasta sauce with garlic and olive oil sliced fresh tomatoes with basil and balsamic vinegar
Option D i.e. sliced fresh tomatoes with basil and balsamic vinegar has the lowest energy density among the given choices.
What is Density?The mass of a substance per unit of volume is termed as its density. Density is most frequently represented by the symbol, however Latin letter D may also be used sometimes. Mass divided by volume is the definition of density in mathematics: where is the density, m is the mass, and V is the volume.
The units of mass divided by volume used to measure density include grammes per centimetre cube (g/cm3) and kilogrammes per litre (kg/l).
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vector r with rightwards harpoon with barb upwards on top has a magnitude of 10 meters and is directed at an angle of 45 degrees above the positive x-axis. what are the components rx and ry?
The components of vector r can be calculated as Rx = 10cos45° = 7.07 meters, and Ry = 10sin45° = 7.07 meters.
What is vector?Vector is a mathematical object that has both magnitude and direction. It can be used to represent physical quantities such as velocity, force, acceleration, and more. Vector calculus is used to study and analyze vector fields, which are collections of vectors that each have a location and a magnitude. Vector notation is used to express vectors in concise mathematical equations.
The components of vector r along the x-axis and y-axis are given by Rx = 10cosθ and Ry = 10sinθ.
Therefore, the components of vector r can be calculated as Rx = 10cos45° = 7.07 meters, and Ry = 10sin45° = 7.07 meters.
Hence, the components of vector r with a magnitude of 10 meters and directed at an angle of 45 degrees above the positive x-axis are Rx = 7.07 meters and Ry = 7.07 meters.
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What is the velocity of the ball at the top?
The velocity of the ball at the top of a projectile's trajectory is zero just because object is at the highest point of its trajectory and it's in stationary phase.
When an object is projected into the air, it is subject to the force of gravity pulling it downward. This force causes the object to follow a parabolic trajectory, where the velocity of the object changes constantly. As the object reaches the highest point of its trajectory, it has reached its maximum height and its upward velocity is zero. The object is at the highest point of its trajectory and it's not moving, so the velocity is zero. It is important to note that this is true for a projectile under the effect of gravity only. If there were other forces acting on the projectile, like air resistance, the velocity at the highest point would not be zero.
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A train travels on a track at a constant velocity of 100 kmh
. Inside one of the train cars is a table and book. The table and the book are moving with the train at constant velocity; however, the table and the book are at rest (stationary) relative to each other.
Using Newton's third law of motion, what is the force relationship between the table and the book? Does it matter that the train is moving?
The table and the book would be moving in the opposite dierection as the train because the train is in motion.
What is the Newton third law?Newton's laws of motion are three fundamental laws that describe the relationship between the motion of an object and the forces acting on it.
From the statement of the Newton third law, the force that is acting on the books is as a result of the force that is acting on the train from the engine and that would be in the opposite direction as we can see in the question.
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Where does the direction of the torque vector depend?
The torque vector's direction has been determined by the direction of force mostly on axis.
An arrow is a convenient technique to depict a vector since it easily indicates both length and direction. A real number would be a useful way to describe a scalar that changes length when multiplication by a vector. Three visual representations with identical vectors are shown on the left.
They are identical because they all have the same length and direction, i.e. they remain parallel to one another. Their position in the space is unimportant.
A vector would be the essential element that comprises what is known as more than just a vector space to a mathematician, supporting the processes of scaling, through sole source of information as scalars, and addition between vectors. When we use vectors to express physical quantities like as velocity, acceleration, as well as force, we may abandon this abstract formulation in favour of a more specific one.
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Answer by 9:20 please!!!! 20 POINTS TO WHOEVER HELPS ME!!!!!!!
Answer:
the answer is d
Explanation:
I need help pls help I am struggling bad
Due to the battery's ability to transform chemical potential energy into electrical energy, the circuit is kept running. Because it transforms electrical energy into light and heat energy, the light bulb consumes power from the circuit.
What is the resistor value of brown black brown gold?I = Req V = (24/5)24 = 5 A of current is being taken from the battery. Using Ohm's Law, V = IR, one may determine the current. In order to compute the current, one must first know the value of R. V is the battery voltage. As a result, a resistor's colour coding is brown, black, brown. 0 ohms, or 100 ohms, is the resistance value. calculating the values for the resistor colour code .
Taking a resistor as an example, the marks are as follows: Yellow Violet Red = 4 7 2 = 4 7 x 100 = 4700 or 4k7 Ohm. When calculating the resistor's percentage tolerance, the fourth and fifth bands are employed. P=2.25R/(R+0.5)2 P = 2.25 R / (R + 0.5) 2 watts are the units of power that a battery may supply to an instrument with resistance R (measured in ohms) (W).
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Please help on all the questions I will post 50 points each
Last option is
Always zero at it falls”
As an object falls down, its gravitational potential energy decreases because, as the height decreases, potential energy of an object decreases.
What is gravitational potential energy ?Gravitational potential energy of an object is the energy stored on it by virtue of its position in a gravitational field. The energy stored is directly proportional to the mass m and the height above the surface.
thus, P = mgh
where g is the acceleration due to gravity.
When a body falls from a height, its potential energy is converting to the kinetic energy. Hence, the total mechanical energy of the body will be constant.
Therefore, as an object moves down, its kinetic energy increases and gravitational potential energy decreases. Hence, option c is correct.
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Answer:
potential energy decreases,
Explanation:
Why is it called a torque?
The name "torque" is derived by from the word "torquere" which means twisting and turning.
The name torque is derived by the ancient people of Rome, who used the word "torque" for a necklaces which was twisted and spiral screw-shaped. The king who conquered ancient Europe wore these necklaces around their necks as a symbol of being a nobleman and also as a good luck charm while going to a battle.
The torque generally means the turning moment or twisting moment. It is widely used in the engineering field. Scientifically, Torque(T) is the moment of force, and equal to product of force vector(F) and displacement vector(R).
T = F×R×Sinθ
Where θ is the angle between the two vectors.
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what is the smallest height needed to make a wave?
Hey there!
Answer and Explanation:A wave can be made at any magnitude of amplitude. Therefore, the smallest height needed to make a wave is at any height.
A wave is a disturbance which travels through a medium transferring energy from one point to another without causing any permanent displacement of the medium.
The height needed by a wave is its amplitude. We can define amplitude as the maximum displacement of wave from original position.
A wave can be made at any magnitude of amplitude. Therefore, the smallest height needed to make a wave is at any height.
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do the results of the experiment depend on whether the power source has some internal resistance, and why or why not?
The internal resistance of every source results in an internal voltage drop, which somewhat lowers the voltage across the terminals.
When a device or electrical circuit has current flowing through it, a voltage drop in the source voltage or internal resistance in the source battery results. Electrolytic material in batteries or other voltage sources is to blame for its cause. The terminal voltage decreases and the internal voltage drop increases with increasing current. There is no current flow when the circuit is open.
The elements that complete the circuit and aid in the passage of electricity within it include cells, EMF, and internal resistance. Internal resistance, emf, and cells are interconnected. Internal resistance and a potential difference, or voltage, are features of batteries, or cells. Explore more below to learn more about cells, emf, and internal resistance.
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for what amount of time must you swim in order to work off three cookies if swimming consumes 520 c/h ?
You should swim for 1.5 hours in order to work off three cookies if swimming consumes 520 c/h .
Swimming is an effective way to burn calories, and can help you work off those pesky extra treats. To burn off just three cookies, you'll need to swim for approximately 1.5 hours.
Here's the math: 3 cookies contain approximately 540 calories, and swimming at 520 calories per hour means you'll need to swim for 1.5 hours in order to burn off the equivalent of three cookies.
Calories can be described as the measuring unit for the amount of energy in a food. If cookies have 520 calories then you need to swim for a time of 1.5 hours to burn those 520 calories.
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when a crane is moving a load it operates within a .
When a crane is moving a load, it operates within a specific area called the crane's working radius or lift zone. This area is determined by the crane's boom length and the location of the load in relation to the crane's base.
It is important to ensure that the load remains within the working radius at all times to prevent accidents or damage to the crane and surrounding property. A crane is a type of machine that is used to lift and move heavy objects. It typically consists of a tower or a framework that supports a vertical beam or "jib," from which a horizontal arm, called the "boom," extends. A motor or engine powers a system of pulleys and cables that are used to raise and lower the load. Cranes are used in a variety of settings, including construction sites, shipyards, and ports, to move materials and equipment. There are many different types of cranes, each designed for specific tasks, such as tower cranes, mobile cranes, and overhead cranes.
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which has higher kinetic energy: a sled resting at the top of a hill or a sled sliding down the hill?
A sled sliding down the hill will have the higher kinetic energy due to its motion as kinetic energy is possessed by an object having motion.
What do you mean by Kinetic energy?The energy which an object has as a result of motion is termed as kinetic energy. Kinetic energy is determined as the effort required to move a mass-determined body from rest to the indicated velocity or in motion in simple words. Until its speed changes, the body maintains the kinetic energy it gained during its acceleration.
The formula for kinetic energy is as follows: K.E. = 1/2 m v2, where m is the object's mass and v is its square velocity. The kinetic energy is measured in kgm^2s if the mass is measured in kilograms and the velocity is measured in meters per second.
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3.a student plots z-1 vs. 1/vm based on data collected during an isothermal expansion of co2. what would you expect the y-intercept to be and why? (2 points)
If the gas were an ideal gas, the y-intercept would be zero since Z=1 [Z-1 --> 1-1=0] in the gas's isothermal expansion.
One criterion, known as isothermal expansion, includes maintaining a constant temperature for the gas. To preserve energy, the gas must absorb heat as it works against the restraining force of the piston. Otherwise, as it spreads, it will cool (or conversely heat as it is compressed).
If the gas is perfect, the y-intercept would be zero since Z=1 [Z-1 --> 1-1=0].
The phrase ideal gas refers to a hypothetical gas made up of molecules that adhere to a few rules: The molecules of an ideal gas do neither attract or repel one another.
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Electric potential depends on which factors?
O A. Distance and amount of charge
B. Density and amount of charge
OC. Mass and distance
D. Mass and amount of charge
Electric potential is influenced by charge and distance.
What does electric potential mean?The amount of effort required to shift a unit of electric charge from a reference point to a particular place in an electric field is known as the electric potential.
What influences electric potential?Any charge in an electric field has an electric potential that is determined by the type (positive or negative), quantity, and location of the charge inside the electric field.
The potential actually grows as you get farther away from the charge, becoming less negative as you get closer to it and eventually reaching zero. The potential for both positive and negative charges is zero at infinite distances from the charge.
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What is the relationship between force lever and angle torque?
The force acting perpendicular to a lever arm is multiplied by the length of the lever arm to create torque. The scalar quantity torque can be oriented either clockwise or anticlockwise.
When a force is applied perpendicular to a lever arm, a torque is produced. The length that extends perpendicularly from the pivot point, or the centre of rotation, to the point at which the force is exerted, is known as the lever arm or moment arm. A pivot point is always used to define a torque.
With each gearing level, a torque multiplier amplifies the torque applied to the bolt. For instance, an output will be produced by a 5:1 torque multiplier. As an illustration, a torque multiplier with a 5:1 ratio will produce five times the torque at the shaft, but since no energy can be produced, the speed will only be one-fifth of the original.
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The probe used in a medical ultrasound examination emits sound waves in air that have a wavelength of 0. 12 mm. What is the wavelength of the sound waves in the patient?a) 0. 54 mm b) 0. 12 mm c) 0. 26 mm d) 0. 027 mm
The wavelength of the sound waves in the patient is 0.54 mm.
We can find frequency v = fλ
f = 340 / 0.00012
f = 2833333.3 Hz
By using v = fλ again
Wavelength is equal to 0.54 mm.
When an object is heated it radiates energy. We have all seen and felt this phenomenon. Some radiation cannot be seen by us, but we can feel it; a wood burning stove radiates infrared light.
We can feel the heat from the stove, and a simple experiment demonstrates that the heat we feel comes from light waves. To stop the heat you only have to hold an object between your face and the stove. As objects get hotter they glow like the burner of an electric stove. As objects continue to be heated they glow brilliantly like the tungsten filament in a light bulb.
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how far must a 2.0-cm-diameter piston be pushed down into one cylinder of a hydraulic lift to raise an 9-cm-diameter piston by 35 cm?
The small piston must be pushed down into one cylinder of the hydraulic lift 1.71 cm to raise the 9-cm-diameter piston by 35 cm.
In a hydraulic lift, the force applied on the smaller piston is transmitted to the larger piston through a fluid, usually oil, in a closed system. The ratio of the areas of the two pistons is equal to the ratio of the forces applied to them.
The area of the smaller piston is:
A_small = (πr^2) = (π(2cm/2)^2) = (π*2^2 cm^2) = 4π cm^2
The area of the larger piston is:
A_large = (πr^2) = (π(9cm/2)^2) = (π*9^2 cm^2) = 81π cm^2
According to the principle of a hydraulic lift, the ratio of the forces applied to the two pistons is equal to the ratio of their areas.
F_large / F_small = A_large / A_small
So if we know the force on the small piston and the distance it moves, we can find the distance the large piston must move to lift the same weight.
F_small = m*g
Where m is the weight of the object to be lifted and g is the acceleration due to gravity.
F_small = (m/A_small) * A_large
then we can find the distance the large piston must move to lift the same weight:
distance_large = (F_small * distance_small) / F_large
Given, the small piston's diameter is 2 cm, the large piston's diameter is 9 cm, and the large piston's distance to lift is 35 cm
A_small = 4π cm^2
A_large = 81π cm^2
distance_small = 2cm
distance_large = 35cm
So the distance the small piston must be pushed down into one cylinder of the hydraulic lift to raise the 9-cm-diameter piston by 35 cm is:
distance_small = (35*4π) / 81π = (140/81) cm = 1.71 cm
So the small piston must be pushed down into one cylinder of the hydraulic lift 1.71 cm to raise the 9-cm-diameter piston by 35 cm.
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1st question:219 kg car is traveling at 17 m/s what kinetic energy of the car
2nd question: 5kg shopping cart pushed with 35 N force over 39 m distance how fast is shopping cart traveling after that point
Kinetic energy of a car traveling at 17 m/s is 49,823 J. The speed of the shopping cart moving at a distance of 39 m is 23.37 m/s.
How to calculate kinetic energy and speed?The kinetic energy of the car can be calculated using the formula KE = (1/2)mv², where m is the mass of the object (in this case, the car) and v is the velocity. Substituting the given values, we get KE = (1/2)(219 kg)(17 m/s)² = 49,823 J.
The final velocity of the shopping cart can be calculated using the equation of work-energy principle, which states that the work done on an object is equal to its change in kinetic energy, W = Fd, where F is the force applied (35 N) and d is the distance over which it is applied (39 m).
Therefore, W = 35 N x 39 m = 1365 J.
To find final velocity, we will use the formula, final kinetic energy = 1/2mv², where m is the mass of the object (5kg) and v is the final velocity.
Substituting the given values, 1365 = 1/25v² so v = √(1365 x 2/5) = √(546) m/s = 23.37 m/s.
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In which position of the swing does the pendulum have the greatest kinetic energy the greatest potential energy?
The position at which the pendulum have the greatest kinetic energy and the greatest potential energy is at the bottom and the top position, respectively.
A pendulum is a weight suspended from a pivot point, it swings back and forth under the influence of gravity. The position of the pendulum where the weight is at the lowest point is called the bottom position, and the position where the weight is at the highest point is called the top position.
At the bottom position, the pendulum has the greatest kinetic energy and the least potential energy. At this point, the weight is moving at its fastest, and the gravitational potential energy is at a minimum.
At the top position, the pendulum has the greatest potential energy and the least kinetic energy. At this point, the weight is moving at its slowest and the gravitational potential energy is at a maximum.
It's important to note that a pendulum will convert kinetic energy to potential energy and vice versa as it swings back and forth. The total energy of the system remains constant as long as there's no external force acting on it.
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i need helppppppp…………
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.