There are two boxes on either side of a pulley. One weighs 7.5kg and falls 4.5m in 1.25s. Find that box's acceleration and tension force, and the other box's mass.

What is conservation of momentum?

Determine the wavelength, assume the density of the medium to be ρ=2.3⋅103kg/m3. express your answer using two significant figures.

Which substance (s) will be good conductors of electricity?

What would happen to the moon if the earth stopped exerting the force of gravity onto it?

How does lubricating a machine affect the output work from that machine? how would the input and output forces be affected?

An anion is an atom that has lost electrons. True or False?

Question: Jane, looking for Tarzan, is running at top speed (4.5 m/s) and grabs a vine hanging vertically from a tall tree in the jungle.

Kim holds a pinwheel in the air and says it can be used to model a source of energy. Identify the type of energy Kim's pinwheel models. Explain the type of energy source used.

An example of a stable system

What causes chemical weathering? a. damage caused by animals and plants c. natural acids b. ice wedging d. physical factors