Which one of the following substances is a liquid fuel used in rocket engines?

a. liquid oxygen
b. potassium perchlorate
c. codium nitrate
d. ammonia

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

Much of the information taught in earth-space science would not be available if it weren’t for our remote sensing abilities. explain two ways our remote sensing strategies contribute to our knowledge of these topics.