Hey can someone help me with this? I dont quite understand it

The acceleration of a rocket increases as it rises up through the atmosphere.

The thrust exerted by the engines doesn't change, so why does the acceleration?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.