Answer:
The strength of an electric field as created by source charge Q is inversely related to square of the distance from the source. This is known as an inverse square law. Electric field strength is location dependent, and its magnitude decreases as the distance from a location to the source increases.
Explanation:
<span>B) Nuclear reactions can release much more energy than chemical reactions</span>
Answer:
Raising the highest point of the track to a higher point
Explanation:
When the rubber ball starts its motion, from the highest point of the track, it has only gravitational potential energy, given by:
where m is the mass of the ball, g is the gravitational acceleration and h is the height above the ground.
As the ball descends the track, this potential energy is partially converted into kinetic energy, given by:
(where m is the mass and v is the speed)
and partially lost as heat, due to the friction between the surface of the track.
As a consequence, the higher the initial height of the track (h in the formula), the greater will be the kinetic energy gained by the ball. A greater kinetic energy means a larger velocity, which also means that the ball will cover a longer distance before stopping.