During a thunder storm, movement of water molecules within clouds creates friction which causes the bottom of the clouds to become negatively charged. This means that the bottom of the cloud and the ground begin to act like parallel plates. Once the electric field between the clouds and the ground becomes larger than 3.0 x 10^6 N/C, lightning will strike. a. If the bottom of the cloud is 150 m above the ground, determine the electric potential difference between the ground and the cloud.
Answers
E = V/d
therefore, the potential is:
V = E * d
so we have:
V = 3 x 10^6 * 150 = 450 x 10^6 J/C (or volts)
that is the electrical potential difference.
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Answer:
At focus.
Explanation:
When the object is placed at the focus of a concave mirror, the image will form at infinity. The formed image is real and inverted and its size is highly enlarged.
When the object is placed between the pole and the focus, the image will formed behind the mirror. The formed image is virtual and erect and its size is enlarged. This is the only case when the formed image is virtual and erect.
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seconds
Answers
Answer:
0.88 seconds
1.33 seconds
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Explanation:
Answer:
0.88 seconds
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Explanation:
Answers
the rest can be understand that he did not clarify
B. the wavelength
C. the center point
D. the trough point
Answers
Answer:
Option (D)
Explanation:
The transverse wave travels in the form of crests and troughs.
The highest point on the wave is called crest.
The lowest point on the wave is called trough.
The part of the wave that best describes lowest point of a wave is the trough (option D)
How do i determine the correct answer to the question?
To know the correct answer to the question, we shall define each option. This is shown below:
Crest of a wave is simply defined as the highest point or peak of a wave. It is the point on the wave propagation where the displacement is at its highest positive value.
Wavelength of a wave is the distance between two successive crest or trough of a wave propagation.
Center point of a wave is simply refer to the rest or equilibrium point of the wave
Trough of a wave is simply the defined as the lowest point of the wave, where the displacement of the wave is maximum in negative values.
With the above information in mind, we can conclude that the correct answer to the question is trough point (option D)
Learn more about trough of wave:
#SPJ6
Answers
Answers
Answer:
60J
Explanation:
friction is the opposition to the motion of an object. Before a body can be set in motion, part of the energy or work-done must be used to overcome friction.
While kinetic energy is the energy associated with a body due to its motion.
Since friction tends to oppose the motion of a body,when a body start to move, some of the energy applied to the body to cause its motion is converted to heat due to friction.
Hence if a work-done of 100J is applied to a body that requires 40J of the work to overcome friction, the total change in the kinetic energy can be expressed as