The energy that is produced by the sun is made by a) fusion. b) fission. c) friction. d) burning fuels.

A) fusion

Explanation:

The process by which a star like our Sun produces its energy is nuclear fusion, which consists of the union of nuclei of certain elements to form other elements.

Since the sun, like the other stars, are very massive objects, they have a very intense gravitational field, which causes the star to compress, which causes its nucleus to reach very high temperatures and then nuclear fusion occurs.

Fusion realeses a lot of energy, and this energy is what makes the sun shine, and also help it to not collapse under its own gravity

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.