Answer:
B
Explanation:
In a two body collision where kinetic energy is conserved , this means the kinetic energy before collision is equal to the kinetic energy after collision.
when kinetic energy is conserved , momentum is also conserved.
m1u1 +m2u2 = m1v1 +m2v2
or
m1u1 +m2u2 = (m1+m2)v
The above equations are for bodies that undergoes elastic and inelastic collisions. It represents their momentum before and after collision which are equal
No. Frequency and speed are completely unrelated concepts. How frequently something occurs is not the same as how quickly. In the universe, at least in the four dimensions that we can understand, there is a speed limit set by the speed of light.
<h3>
What is Frequency?</h3>
The frequency of a repeated event is its number of instances per unit of time. In some cases, it is also referred to as temporal frequency or ordinary frequency to emphasize differences with spatial and angular frequencies, respectively. In physics, frequency is the number of waves that pass a fixed point in a unit of time as well as the number of cycles or vibrations that a body in periodic motion experiences in a unit of time. The pace of direction changes in current per second is known as frequency. It is expressed in hertz (Hz), a unit of measurement that is used internationally. One hertz is equivalent to one cycle per second. A cycle is one whole alternating current wave.
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Answer:
1: surface temperature
2: red giant
3: The brightest stars are called supergiants. Star clusters are rich in stars just off the main sequence called red giants. Main sequence stars are called dwarfs.
4: A white dwarf is very dense
5: red giant
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Answer:
The statement is true
Explanation:
The complete question is
Light bends when it changes the medium because the dielectric permittivity of the material makes the path more hard to penetrate
True or False
Solution
The given statement is true as it is the dielectric permittivity of the material which does not allow light to pass through it easily.
The medium decrease the amplitude of light and hence induces change in direction without altering its velocity or frequency.