Answer:
transmit energy
Explanation:
Waves (both mechanical and electromagnetic) are periodic perturbations of the space that transmit energy without transmitting matter. (so, "transmit energy" is valid for both types of waves).
The other statements are wrong because:
have compressions and rarefactions --> this is a property only of longitudinal waves, while electromagnetic waves are transverse, so they do not have compressions
oscillate in the same direction as the wave motion --> this is the description of longitudinal waves, while electromagnetic waves are transverse,
require a medium for transfer --> this is true only for mechanical waves: electromagnetic waves in fact do not need a medium to propagate.
"Reflection" is the change direction of waves when blocked by obstacle
Answer:
The seed as a fraction of the speed of light is
Solution:
As per the question:
Suppose, be the rate of an identical clock between two time intervals.
For a moving clock, moving with velocity 'v', at the clock tick of four-fifth:
t =
Now,
Using the relation of time dilation, from Einstein's relation:
Squaring both sides:
Answer:
Explanation:
When force applied to the end of the rod in perpendicular direction then net torque on the rod is given as
Now another force is applied at mid point of the rod at an angle of 30 degree with the rod
so new value of torque is given as
so we have