Due to the Doppler effect which states that there is a change in frequency because of the relative speeds of two bodies time dilation takes place. For light the relative difference in velocity between the observer and the source needs to be considered.
Time dilation is the phenomenon where time flows differently for two bodies having different to each other. Time dilation has been verified by the readings of the satellite navigation systems.
Δt' = Time elapsed of a moving body
Δt = Time elapsed when the body is stationary
v = Velocity of the moving body
c = Speed of light
As, v is always less than c, Δt' will always be greater than Δt. This means that more time has elapsed for the body in motion.
Hence, the clock in motion will be faster than an identical clock at rest.
Point out that when water<span> freezes, the </span>water<span> molecules have slowed down enough that their attractions arrange them into fixed positions. </span>Water<span> molecules freeze in a hexagonal pattern and the molecules are further apart than they were in liquid </span>water<span>. Note: The molecules in </span>ice<span> would be vibrating.</span>
The answer is that there is no magnetic force on the wire. The force on a wire is the cross product of the current thru it and the magnetic field it is in. In your case, both are parallel and the cross product is therefore zero.
F = (n x i)2 x magnetic constant x a / (2 x g2)
F = Force, i = Current, g = Length of the gap between the solenoid and a piece of metal, a = Area n = Number of turns, Magnetic constant = 4 x PI x 10-7.