In which of the following situations is the kinetic energy of the object decreasing? A
A sphere is dropped from a building,
A satellite is moving in a circular orbit around Earth
с
A baseball is heading upward after being thrown at an angle,
D
An elevator is moving upward at a constant velocity,

Which expression allows you to determine the mechanical advantage of an inclined plane? a. height of plane / input force b. length of plane / input force c. length of plane / height of plane d. height of plane / length of plane

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.