Answer:
(a) In the direction of velocity
(b) E = - 639.84 N/C
Solution:
As per the question:
Speed of the electron, 
= 0.1% c
where
c = 
Thus
Distance, x = 4.0 cm
Now,
(a) The direction of the electric field is the same as that of the velocity.
(b) The electric field strength can be calculated as:
By Kinematics eqn:
Electric field strength can be calculated as:
Also,
F = ma
m = mass of electron = 
q = charge on electron = 
Thus
E = - 639.84 N/C
To calculate the density of the white dwarf we need the mass of the Sun and the radius of the Earth:
- Sun mass:
- Earth radius:
Assuuming the dwarf to be a perfect sphere, its volume is
.
The average density is given by
so, substituting we find
Newton’s Third Law!
Every action has an equal, but opposite, reaction. When you jump from the boat, you exert force on the boat as you leap from it. Since the boat rests on a liquid instead of a solid (much less friction), it moves away from the jumper as a result of the leap.
A mature thunderstorm will contain both updraft and downdrafts. The given statement is true.
When the cumulus cloud becomes very large, the water in it becomes large and heavy. Raindrops start to fall through the cloud when the rising air can no longer hold them up. Meanwhile, cool dry air starts to enter the cloud. Because cool air is heavier than warm air, it starts to descend in the cloud (known as a downdraft). The downdraft pulls the heavy water downward, making rain.
This cloud has become a cumulonimbus cloud because it has an updraft, a downdraft, and rain. Thunder and lightning start to occur, as well as heavy rain. The cumulonimbus is now a thunderstorm cell.
