Explanation:
This process is called Bonding and it is done to provide low resistance path to ground.
"Bonding — a low impedance direction achieved by permanently connecting all non-current-carrying metal parts to maintain electrical stability and to be able to conduct any current that is likely to be put on it safely.
Answer:
The momentum of the plastic car is same the the momentum of the lead car.
Explanation:
Given that,
Mass of plastic car = 0.2 kg
Mass of lead = 20 kg
Time = 1 sec
Equal forces are used to push both carts
We need to calculate the momentum
Using formula of momentum
Put the value into the formula
For plastic cart,
...(I)
For lead cart,
...(II)
Divided equation (I) by equation (II)
Hence, The momentum of the plastic car is same the the momentum of the lead car.
Explanation:
The visible light coming from celestial bodies from space are affected most by the atmosphere. The visible light suffer blurring and absorption. So, to avoid such situation optical telescopes are kept in mountains where atmosphere is thin.
Whereas radio signal are not affected by the atmosphere so, they need not be placed in mountains.However, it is affected by various noises from the man made devices. So, to avoid these noises radio telescopes are kept in deep valleys.
Occurs when its going from one medium to another. But remember when the density of the medium is changed, the velocity of the wave would most likely change.