If you flip a fair coin a total of ten times, how often will you likely get heads.
What are Coins ?You anticipate getting 0 heads roughly 0.1% of the time, 1 head roughly 1% of the time, 2 heads roughly 4% of the time, 3 heads approximately 12% of the time, 4 heads ultimately just 25% of the time. It works the exact opposite for heads six through ten.
Likelihood curve with successively steeper bell curves stacked on one another As the number of tosses rises, the probability of receiving heads tends to cluster closer to 50%.
Peter Hermes Furian/Shutterstock provided the photo. It demonstrates that you can pretty much predict any outcome after flipping a fair coin ten times.
Therefore, If you flip a fair coin a total of ten times, how often will you likely get heads.
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an osprey call is a distinct whistle at 2,200 hz. an osprey call while diving at you, to drive you away from her nest. you hear the call at 2,300 hz. how fast is the osprey approaching?
The speed of the osprey approaching you can be calculated by finding the difference between the frequencies of the two calls and then dividing it by the time it takes for the sound to travel.
The speed of sound is approximately 343 meters per second, so the speed of the osprey can be calculated as follows:
(2300 Hz - 2200 Hz)/(1/343) = 343 m/s.
This means that the osprey is approaching you at a speed of 343 meters per second.
The osprey’s call is a distinct whistle at 2200 Hz which is clearly audible to humans, and this frequency can be used to determine how far away the osprey is from you. The difference between the two calls, 2200 Hz and 2300 Hz, can be used to calculate the speed of the osprey as it dives towards you.
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Can anyone please help me solve this question?
A car is moving due to x(t) = -2.4 t^2 + 1.2 t^3.
i) Calculate its total displacement between t = 0 and t = 4 seconds.
ii) Calculate its average velocity between t = 0 and t = 4 seconds.
(i) The total displacement of the car is 38.4 m.
(ii) The average velocity of the car is 9.6 m/s.
What is the total displacement of the car?
The total displacement of the car is calculated as follows;
x ( t ) = -2.4t² + 1.2t³
when time, t = 0
x ( 0 ) = -2.4 (0)² + 1.2 (0)³
x ( 0 ) = 0 m
when time, t = 4 seconds
x ( 4 ) = -2.4 (4)² + 1.2 (4)³
x ( 4 ) = 38.4 m
The average velocity of the car is calculated from the ratio of the total displacement to total time of motion.
v ( avg. ) = ( total displacement ) / ( total time )
v ( avg. ) = ( 38.4 m ) / ( 4 s )
v ( avg. ) = 9.6 m/s
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The table shows how the time it takes a train to travel between two cities depends on its average speed. The table shows how the time it takes a train to travel between two cities depends on its average speed which rational function models the time, y, in hours, that it takes the train to travel between the two cities at an average speed of x miles per hour?.
Using the relation between speed and time, y = 160/x.
Speed is calculated as follows: speed = distance * time. Knowing the units for distance and time is necessary to calculate the units for speed. The units will be in metres per second (m/s) in this example since the distance is measured in metres (m) and the time is measured in seconds (s).
The table illustrates how a train's average speed affects how long it takes to travel between two cities.
function calculates the number of hours,( y)
needed for the train to move x miles per hour between two cities.
Y stands for time, and X is the average speed.
Since distance equals speed twice,
Let's use the table to determine the distance.
distance:
32 × 5 = 160
40 × 4 = 160
50 × 3.2 = 160
Time is defined as distance times speed, where distance is 160 and speed is x y = 160.
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Complete question -
two cars traveling on the parallel lanes of a two-lane road. The cars' motions are represented by the position versus time graph shown in the figure. Answer the questions using the times from the graph indicated by letters.-at which of the times do the two cars pass each other?
The two cars pass each other at time point B. At time point B, the two cars have the same position (x=6 m), meaning the cars have just passed each other.
What is same position?
The term "same position" refers to a job that is equivalent to the one held by the employee at the time of their retrenchment in terms of its duties, responsibilities, requirements, and obligations. It is the employee's duty to make sure the College's records reflect their current address in order to make communications about reappointment easier. Offers of reemployment made under this Section must be made after those made under Section 35.6 of this Article. Additionally, in the event that multiple laid-off employees apply for the same position and it is determined that the position to be filled is the same for more than one employee, offers of reappointment made in accordance with this Section shall be based on seniority.To learn more about same position here
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Please help me by 8:30! Thank you so much!
The statement that best describes the future generations of these bacteria is they will be produced by asexual reproduction and will be more resistant to the antibiotic. The correct option is B.
What is resistant to antibiotics?When the body develops a resistance to antibiotics, antibiotic resistance happens.
Because antibiotics are unable to combat bacteria, the bacteria grow and produce illnesses that can result in life-threatening infections, incapacity, or even death.
Therefore, the correct option is B) They will be produced by asexual reproduction and will be more resistant to the antibiotic.
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If Earth's mass doubled without
changing its size, your weight
would
a. increase because gravitational
force increases.
b. decrease because gravitational
force increases.
c. increase because gravitational
force decreases.
d. not change because you are
still on Earth.
A) your weight doubles because gravity doubles.
when the below images are shown in succession, a person will see either up-to-down motion or right-to-left motion. which hidden assumption of the visual system does this illustrate?
C. All points on a moving object are assumed to move in synchrony.
The visual system makes the assumption that all points on a moving object are assumed to move in synchrony. This is illustrated by the phenomenon where a person will see either up-to-down motion or right-to-left motion when the images are shown in succession. The visual system makes this assumption to simplify the processing of visual information and to help us perceive motion.
This assumption allows the brain to quickly and easily track an object as it moves, even when the object is moving in a complex or irregular pattern. This assumption is not always correct, and sometimes leads to visual illusions, but it is a fundamental aspect of the way we perceive motion.
Complete question:
When the below are shown in succession, a person will see either up-to-down motion or right-to-left motion. Which hidden assumption of the visual system does this illustrate?
A. There is a single, overheard source of light
B. Things tend to move in a straight line
C. All points on a moving object are assumed to move in synchrony
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HELP ASAP PLS
ball is thrown horizontally from a hill 42.9 m high at a velocity of 5.85 m/s.
Find the distance between the base of the hill and the point where the ball hits
the ground?
According to the question,Distance = 42.9 m + (5.85 m/s)2/2g,Distance = 42.9 m + 33.67 m,Distance = 76.57 m
What is the Distance ?
The distance between two points is a measure of the length of the path connecting them. It is usually expressed in units of length such as meters, kilometers, or miles. The distance between two points can be calculated using the Pythagorean Theorem, which states that the sum of the squares of the two sides of a right triangle is equal to the hypotenuse's square, or the triangle's longest side. In two-dimensional space, the distance between two points can be determined by finding the length of the line segment connecting them. In three-dimensional space, the distance between two points can be determined by finding the length of the line segment connecting them as well as the angle between the line segment and the plane on which the points exist.
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assuming that the thermal efficiency of the engine is 35% how much diesel fuel will the engine consume in one hour at full load?
Assuming that the generator is 90% efficient the horsepower that the engine deliver to the generator at full load will be a)148.9hp. Assuming that the thermal efficiency of the engine is 35% the diesel fuel will the engine consume in one hour at full load will be
b)25.2kg
1) To identify the power required for the generator to run at 100 kW.
This is accomplished by keeping in mind that a generator's efficiency is defined as the ratio of actual power to ideal power.
[tex]\alpha g = \frac{wi}{wr} [/tex]
here,
α is generator efficiency that is equal to 0.9
Wi is nominial or ideal efficiency that is equal to 100Kw
Wr is the real effiency
Now, solving for Wr
[tex]wr = \frac{wi}{ \alpha g} [/tex]
[tex] \frac{100kw}{0.9} [/tex]
= 111.1kW
For the generator to produce 100 kilowatts, the combustion engine must produce 111 kilowatts. Use the conversion factor to determine the value in horsepower.
[tex]111.11kw? \times \frac{1hp}{0.746kw} [/tex]
= 148.9hp
2) Using the combustion engine efficiency definition, determine the engine's power source.
[tex]\alpha m = \frac{wo}{ws} [/tex]
here,
α is the engine efficiency that is equal to 0.35
Wo is the output power that is equal to 111.11Kw
Wi is the supply power
Now, solving for Wi
[tex]wi = \frac{wo}{ \alpha m} [/tex]
[tex] \frac{111.11kw}{0.35} [/tex]
= 317.45kW
3) Remember that the supply power is the result of the mass flow and the caloric power when calculating the mass flow using the calorific power of diessel (CP=45KJ/g).
here,
Wi is equal to m(CP)
mass flow = m
Now, figuring out m
[tex]m = \frac{wi}{cp} [/tex]
[tex] \frac{317.45kw}{45000jg} [/tex]
= 7g/s
4) The diessel consumed in an hour at full load is determined by the mass flow, which is the product of the mass consumed and the duration (1h).
here,
Mass diesel consumed is M.
m is equal to M/t
M is equal to mt
[tex]m = (7 \times \frac{g}{s})1hour[/tex]
[tex] \frac{3600s}{1hour} [/tex]
= 25200g
= 25.2Kg
Note that the full question is:
A standby generator powered by and internal combustion engine has a rated capacity of 100kW. Assuming that the generator is 90% efficient how much horsepower must the engine deliver to the generator at full load? Assuming that the thermal efficiency of the engine is 35% how much diesel fuel will the engine consume in one hour at full load?
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Ingrid lives in a cold country that sometimes gets lots of snow. When that happens , people can enjoy the sport of skiing. Ingrid goes outside to see if the snow is fit for skiing. She sinks into the snow , but when she puts her skis in,she can move over the snow without skiing. Why?
As the surface area of her skis is greater than her shoes, the pressure is less when she puts her skis in. So, Ingrid can move over the snow without skiing.
What is pressure?The force perpendicularly applied to an object's surface divided by the area over which it is dispersed is known as pressure. The pressure as compared to the surrounding air pressure is known as gauge pressure. To express pressure, a variety of units are employed.
As the pressure is less when she puts her skis in compere to shoes, Ingrid can move over the snow without skiing.
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The drawing shows a uniform electric field that points in the negative y direction; the magnitude of the field is 7300 N/C. Determine the electric potential difference (a) VB - VA between points A and B, (b) VC - VB between points B and C, and (c) VA - VC between points C and A
An electric potential difference of:
(a) VB - VA between points A and B, is 0 V(b) VC - VB between points B and C, is 592 V(c) VA - VC between points C and A, is -592 VElectric potential or what is often referred to as electric voltage is the amount of electrical energy used to move each coulomb of electric charge from one end of the conductor to the other end of the conductor.
→ Here there is a uniform electric field of magnitude E =7300N/C
A and B have the same potential and hence VB-VA = 0
→ We know that the electric field is always directed from higher to lower potential.
Then VC-VB will be positive.
Then VC-VB = Ey
Here y =8cm = 0.08m
Then VC-VB = (7400N/C) (0.08m) = 592Volts
→ Now we need to find the potential difference between A and C
VA-VC = E.r
VA-VC = (7400) (-j) ((0.06m) (-i)-(0.08m) (-j))
VA-VC = 592Volts
The expression for the electrical potential difference between any two points is,
The direction of the position vector which is from points C to point A is shown in the figure.
The electrical lines always start from a positive charge and end at negative charge. So, the electric field is directed downward.
VA-VB = Er
(a)
From the above figure, points A and B are on the same line, this means they lie on the equipotential surface.
On equipotential surfaces, no work is done to bring the charge from one point to another point.
Here, no work is done to bring the charge from point A to point B, then the potential difference is,
VB-VA = WAB/q
VB-VA = 0/q
VB-VA = 0 V
(b)
From the above figure, point C is at higher potentials, and point B is at lower potentials, so, the potential difference between points C and B is positive.
The expression for the potential difference between points C and B is,
VC-VB = Er
The electric field vector is,
E = (7400 N/C) (-j)
The position vector of CB is,
rCB = (8.0 cm) (-j)
Then calculate the potential difference between points C and B as follows:
VC-VB = Er
VC-VB = (7400 N/C) (-j)*(8.0 cm) (-j)
VC-VB = 592 V
(c)
From the above figure, point C is at higher potentials, and point A at lower potentials, so, the potential difference between points A and C is negative.
VA-VC = Er
The expression for the potential difference between points A and C is,
E = (7400 N/C) (-j)
The position vector of CB is,
r = (r sinθ(-i)) + (r cosθ(-j)
The values of sin and cos are,
cosθ = 8.0cm/10.0cm
cosθ = 0.8 cm
sinθ = 6.0cm/10.0cm
sinθ = 0.8 cm
The magnitude of the positive vector is,
r = 10 cm
Then calculate the potential difference between points A and C as follows:
VA-VC = - Er
VA-VC = -((7400 N/C) (-j)) *((r sinθ(-i)) + (r cosθ(-j))
VA-VC = -(7400 N/C) (r sinθ) (j.i) + (7400 N/C) (r cosθ) (j.i)
VA-VC = -(7400 N/C) (r cosθ)(1)
VA-VC = -(7400 N/C) (0,01) (0.8)
VA-VC = -592 V
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if light moves at a speed of about 3.0 x 108 m/s, how far will light travel in 12.3 nanoseconds? express your answer in meters using the correct number of significant figures. do not enter your answer using scientific notation.
The light travel 3.69 metres in given time of 12.3 nanoseconds.
What is speed?Speed is the rate of change of an object's position relative to a given frame of reference. It is a scalar quantity, meaning it has both magnitude and direction.
Speed is usually measured in meters per second (m/s) or kilometres per hour (km/h). Speed is an important factor in many activities, including travel, sports, and transportation.
This can be calculated by
3.0 x 10⁸ m/s ×1.23 x 10⁻⁸ ns
= 3.69 metres
Thus, The light travel 3.69 metres in given time of 12.3 nanoseconds.
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At what position is the kinetic energy of the pendulum at its maximum?
The extreme left position of a basic pendulum has the most kinetic energy in the bob. Kinetic energy will be at its highest at the equilibrium position since velocity will be there as well.
The energy of motion is known as kinetic energy, and it may be observed in the motion of objects or subatomic particles. Every moving object and particle contains kinetic energy. A human walking, a baseball soaring through the air, food falling from a table, and a charged particle in an electric field are all examples of kinetic energy in action. The formula for kinetic energy is as follows: K.E. is equal to half of an object's mass times its square velocity, or m/v2. If the mass is measured in kilogrammes and the velocity is measured in metres per second, the kinetic energy is expressed in kilogram-meter squared per second squared.
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vector a has a length of 9 units and is directed to the north. vector b has a length of 4 units and is directed to the south. calculate the magnitude and direction of (a b) group of answer choices
The magnitude of (a−b) is 5 units, and the direction is to the north.
What is magnitude?
Magnitude is a term used to describe a physical quantity's size or intensity. For different kinds of physical quantities, such as distance, speed, energy, and force, it is typically represented by a numerical value that can be expressed in a variety of different units. A key idea in physics, mathematics, and other sciences, magnitude is used to compare and quantify various physical properties.By dividing the magnitudes of a and b, which are |a| = 9 and |b| = 4, you can get |ab| = 5 units. The direction is established by the angle of a, which points north.To learn more about magnitude here
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a 60 kg woman prepares to swing out over a pond. what is the tension in the rope if she is to maintain a circular arc at the lowest point of the swing?
When she starts her swing by stepping off the platform, the tension in the rope is equal to her weight, or 60 kg x 9.8 m/s^2 = 588 N. When she is 5.0 m above the surface of the pond, the tension in the rope is equal to the force needed to keep her in a circular arc, which is her weight plus the force of gravity acting on her at that height.
This can be calculated using the formula: T = m (g + a), where m is her mass, g is the acceleration due to gravity, and a is the centripetal acceleration. The centripetal acceleration at this height can be calculated using the formula: a = v^2/r, where v is her velocity and r is the radius of her circular arc. Since we do not know her velocity, we can use the equation: T = m (g + v^2/r) to solve for T. Substituting in the known values, we get: T = (60 kg) (9.8 m/s^2 + (v^2/5.0 m)) = 588 N + 12 N = 600 N.
At the lowest point of her swing, the tension in the rope is equal to the force needed to keep her in a circular arc, which is her weight minus the force of gravity acting on her at that height.
This can be calculated using the formula: T = m (g - a), where m is her mass, g is the acceleration due to gravity, and a is the centripetal acceleration. The centripetal acceleration at this height can be calculated using the formula: a = v^2/r, where v is her velocity and r is the radius of her circular arc. Since we do not know her velocity, we can use the equation: T = m (g - v^2/r) to solve for T. Substituting in the known values, we get: T = (60 kg) (9.8 m/s^2 - (v^2/5.0 m)) = 588 N - 12 N = 576 N.
Note: The values of v and r are not given in the question, so we have used the formula for T as a function of v^2/r.
Complete question:
A 60 kg woman prepares to swing out over a pond on a rope. What tension in the top is required if she is to maintain a circular arc A). When she starts her swing by stepping off the platform, B). When she is 5.0 m above the surface of the pond, and C). at the lowest point of her swing?
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a 2,500-lb vehicle has a drag coefficient of 0.31 and a frontal area of 20 ft2. what is the approximate minimum tractive effort required for this vehicle to maintain a 50 mi/hr speed on a 5% upgrade through an air density of 0.002045-slugs/ft3?
A 2500-lb vehicle has a drag coefficient of 0.31 and a frontal area of 20 ft2, and the minimum tractive effort = 214.051 lb.
To find the minimum tractive effort,
Vehicle weight is 2500 lb
Drag coefficient is 0.31
Frontal area 20 ft^2
Vehicle speed is 50 mi/hr = 73.33 ft/sec
Gradient - 5%
Air density = 0.002045 slugs/ft^3
Drag force is a type of fluid force that opposes the motion of an object moving through a fluid (liquid or gas). It is a frictional force that acts in the direction opposite to the velocity of the object.
The magnitude of the drag force depends on several factors, including the velocity of the object, the density of the fluid, the cross-sectional area of the object, and the shape of the object.
In aerodynamics, drag force is a major factor in the design and performance of aircraft, as it can significantly affect the lift-to-drag ratio, fuel efficiency, and overall speed of the aircraft.
Drag force is given as,
Fd = 1/2CdρAV²
= 0.5× 0.31 × 0.002045× 20× 88²
= 49.093 lb.
Force due to vehicle weight,
Fw = 0.01 ( 1+ υ/147)W
= 0.01 ( 1 + 88/147) 2500
= 39.965 lb.
Force due to gradient
Fg = W × g
= 2500 × 0.05
= 125 lb
Minimum tractive effort
F = Fd + Fw +Fg
= 49.093 + 39.965 + 125
= 214.051 lb
Therefore, A 2500-lb vehicle has a drag coefficient of 0.31 and a frontal area of 20 ft2, and the minimum tractive effort = 214.051 lb.
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A block of unknown object has the measurements of 5-cm by 2-cm by 3-cm What is the density of the unknown object?
Answer:
volume = 30cm^3
Explanation:
What happens when light is completely transmitted through an object?
When light is completely transmitted through an object the vibrations of the electrons are passed on to neighbouring atoms through the bulk of the substance and reemitted on the reverse side of the object if the object is transparent. Light wave frequencies of this type are said to be transmitted.
What is Light?Light, also referred to as visible light, is electromagnetic radiation that is visible to the unaided eye. In general, visible light is described as having wavelengths between 400 and 700 nanometres (nm), or frequencies between 750 and 420 terahertz, which fall between infrared and ultraviolet light, which have longer wavelengths (with shorter wavelengths).
On Earth, the Sun is the primary source of natural light. Fire has historically played a significant role in human lighting, from primitive campfires to contemporary kerosene lamps. Electric lighting has effectively replaced firelight as a result of advancements in electric lights and power systems.
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if the fastest you can safely drive is 65 mi/h, what is the longest time you can stop for dinner if you must travel 402 mi in 10.8 h total?
The required longest time you can stop for dinner when you travel at 65 mi/h is calculated to be 4.62 hours.
Given that,
Distance travelled is 402 mi in 10.8 h.
Time in which same distance can be travelled with 65 mi/h = ?
We know the speed can be written as,
Speed = Distance/ Time
Speed = 402/10.8 = 37.22 mi/h
The longest time you can stop for dinner when you travel at 65 mi/h is given as,
65 = 402/t
Time t = 402/65 = 6.185 hours
Required time = 10.8 h - 6.185 h = 4.62 h
Thus, the required longest time you can stop for dinner when you travel at 65 mi/h is calculated to be 4.62 hours.
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a particular system is doing work on the surroundings as well as losing heat to the surroundings. what can be said about the values of q (heat) and w (work) for this system? group of answer choices
The correct option is given by: C. The sign of q is positive when heat is being absorbed and the sign of w is negative when work is being done by the system.
Describe thermodynamics.
The study of the connections between heat, work, and energy is known as thermodynamics. It is a fundamental science that concentrates on how systems behave when they are in thermal equilibrium. From the macroscopic scale of engineering and biology to the subatomic scale of physics, thermodynamics can be applied to a variety of topics. We can forecast how matter and energy will behave by using the laws of thermodynamics. The w is positive and the q is negative. This is due to the fact that according to the first law of thermodynamics, any energy used by a system to affect its surroundings must be taken from the system itself, which causes the system's energy to decrease. Consequently, w (work) is positive and q (heat) is negative.To learn more about thermodynamics here
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A particular system is doing work on the surroundings as well as gaining heat from the surroundings. What can be said about the values of q (heat) and w (work) for this system?
A. q is negative and w is negative
B. q is negative and w is positive
C. q is positive and w is negative
D. q is positive and w is positive
E. Nothing can be determined about q and w.
Name the following.A subatomic particle that carries a negative charge.
An electron is a subatomic particle that carries a negative charge.
An electron is a subatomic particle that carries a negative electric charge. It is one of the three main subatomic particles that make up an atom, along with protons and neutrons. Electrons have a very small mass compared to protons and neutrons, and are found outside the nucleus of an atom, in the electron cloud or electron shell. The number of electrons in an atom is equal to the number of protons in the nucleus, which means that atoms are electrically neutral.
The behavior of electrons is described by quantum mechanics, and it is responsible for the chemical properties of an atom. The electrons are arranged in energy levels or orbitals around the nucleus. The outermost energy level is called the valence shell, and the number of electrons in this level determines the chemical reactivity of the atom.
In chemical reactions, electrons can be transferred from one atom to another, forming chemical bonds. This is the basis for the formation of molecules and compounds. The movement of electrons also gives rise to electrical phenomena such as electric current and magnetism.
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Complete question:
The subatomic particle that carries negative charge
A. Electron
B. Proton
C. Neutron
D. None of these
The universe now contains a large variety of different elements. Describe how this happened
Answer: Because Allah made it
Explanation:
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. if the coefficient of static friction between a 0.25 kg piece of swiss cheese and a vinyl record is 0.35, what is the maximum rpm the record can have before the cheese slides off the record?
The maximum RPM that a vinyl record can have before a piece of Swiss cheese slides off is approximately 0.0428 RPM.
In order to calculate the maximum RPM that a vinyl record can have before a piece of Swiss cheese slides off, we need to use the coefficient of static friction between the cheese and the record. The coefficient of static friction is a value that represents the ratio of the force of friction to the normal force.
The equation for the force of friction is given by:
friction = coefficient of static friction × normal force
The normal force is the force that is perpendicular to the surface and is equal to the weight of the object. So the weight of the cheese is 0.25 kg * 9.8 m/s^2 = 2.45 N . We know that the coefficient of static friction is 0.35, so we can plug these values into the equation to find the force of friction:
friction = 0.35 × 2.45 N = 0.855 N
The centripetal force is the force that keeps an object moving in a circular path. It is given by the equation:
centripetal force = m × v² / r
Where m is the mass of the object, v is the velocity, and r is the radius. To find the maximum RPM, we need to find the point at which the force of friction is equal to the centripetal force.
As the radius of the record is not specified, we can consider that it is equal to 1m.So we can put all this information together and write an equation:
0.855 N = 0.25 kg × v² / 1m
Solving for v, we get:
v = √(0.855 N ×1m / 0.25 kg)
v = √(3.42) m/s
To convert this velocity to RPM, we need to divide by the circumference of the record, which is 2πr, so:
RPM = v / (2πr) = v / (2π)
RPM = √(3.42) / (2π) = √(3.42) / (6.28) = 0.27 / 6.28 = 0.0428
So the maximum RPM that a vinyl record can have before a piece of Swiss cheese slides off is approximately 0.0428 RPM.
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you throw a ball straight up in the air, and it falls back down. what is the ball's acceleration at the moment it's at its peak height?
When you throw a ball straight up in the air and it falls back down. Then, the acceleration at the moment it's at its peak height is pointed downwards.
The acceleration of the ball is equal to the gravitational acceleration (-9.8 m/s²) during the entire motion regardless of its position.
The velocity of the ball at its peak height is equal to zero, because the peak height is the point where the ball starts to move to the opposite direction, which means that after the ball is thrown its velocity starts decreasing during the upward motion, it declines to the zero and then it starts increasing in the negative direction.
This change in the sign from positive to negative can only happen when the velocity is equal to zero.
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Which statement is true?
A compass points to the South Pole.
The North and South Poles never switch places.
The North and South Pole switch places about every 400,000 years.
Earth’s gravitational field causes the northern and southern lights.
They do switch places, and yes. The northern/southern lights are made by the electric field.
If the mass of something is 2 and the gravitational field strength is 10 what is the weight?
The weight of an object and its mass are directly proportional. For a given gravitational field strength, the greater the mass of the object, the greater its weight.
What is the gravitational force?gravitation is the force that pulls two masses toward each other. Believe it or not, every single particle of matter in the universe exerts gravitation on every other particle. The terms gravitation and gravity are often used interchangeably for the attraction between everything with energy or mass.The force of gravity, or gravitational force, pulls objects with mass toward each other. We often think about the force of gravity from Earth. This force is what keeps your body on the ground. But any object with mass exerts a gravitational force on all other objects with massGravity, also called gravitation, is a force that exists among all material objects in the universe. For any two objects or particles having nonzero mass, the force of gravity tends to attract them toward each other. Gravity operates on objects of all sizes, from subatomic particles to clusters of galaxies.To learn more about gravitational force refers to:
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Because of temperature differences, the most plentiful terrestrial wavelengths are 20 times _______ than solar wavelengths
The most common wavelengths on Earth are 20 times longer than solar wavelengths due to temperature differences.
Since the Sun is hotter than the Earth, its radiation has a shorter wavelength, as the peak of Planck's curve for higher temperatures occurs at shorter wavelengths. For this reason, solar radiation is dubbed shortwave and Earth's longwave.
Photons or electromagnetic waves are radiation. For simplicity, atmospheric research treats radiation as a wave rather than a photon. Electromagnetic radiation, formed by electric and magnetic fields, has many names based on wavelength.
You likely know that radio waves and x-rays differ in wavelength. Warmer things generate electromagnetic radiation at higher frequencies and shorter wavelengths than colder ones. From atoms to planets and from near absolute zero to tens of millions of Kelvin.
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Explain how an object can be in motion if no net force is acting on it.
two point charges 2.0 cm apart have an electric potential energy - 180 mj. the total charge is 30 nc. what are the two charges?
The values of the two charges which are 2.0 cm apart and have a total charge of 30nC are 4×10⁻⁸ C and −1×10^⁻⁸ C.
The electric potential energy between two charged particles is inversely proportional to the separation between the two charges and is proportional to the product of one charge and another. The SI unit of the electric potential energy is Joule.
The electric potential energy V between two point charges p and q are given byV=kpq/r² where k is proportionality constant and its value is k=8.99×x10⁹ N⋅m2/C2, total charge = (p+q=3×10⁻⁸C) and the distance between the two charges, r = 0.02m. We know that V = −180μJ. Substitute q=(3×10⁻⁸-p) into the above equation, and we have p²−3×10⁻⁸xp−4×10⁻¹⁶=0. Solving for p, we have the charges of 4×10⁻⁸ C and −1×10⁻⁸ C.
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According to some nineteenth-century geo-
logical theories (now largely discredited), the
Earth has been shrinking as it gradually cools.
If so, how would g have changed over geo-
logical time?
A. ) It would increase; g is inversely proportional to the square of the radius of the earth
B. ) It would decrease; the Earths radius is decreasing
C. ) It would not change; the mass of the earth remained the same
Since g is inversely proportional to the square of the Earth's radius, it would rise. The right answer is A.
Geological theory: what is it?Geologists currently hold the view that the earth's crust is composed of a few large, hard plates that move apart from one another, creating deformation, volcanism, and seismic activity along their boundaries.
Plate tectonics gives "the overall picture" of geology because it explains how mountain ranges, earthquakes, volcanoes, shorelines, and other features frequently appear where the moving plates interact along their boundaries.
According to several geological theories from the nineteenth century, which have already been entirely disproved, the Earth has been shrinking as it gradually cools.
Since g is inversely proportional to the square of the Earth's radius, if that were the case, it would increase.
Therefore, choice A is the best one.
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