Abox of groceries requires five newtons of force to lift it one meter to the counter. how many joules of work is done?
i need understanding the formula used to determine this.

A15,000 kg rocket traveling at +230 m/s turns on its engines. over a 6.0 s period it burns 1,000 kg of fuel. an observer on the ground measures the velocity of the expelled gases to be −1,200 m/s.

Explain the difference in reactivity of the elements based on their electron configurations.

An object is kept at 45 m high and how much time will it take to reach the ground