How does the law of conservation of mass apply to this reaction:Al+3HCl-->H2+AlCl3

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.

Which statement best defines why sound waves are mechanical waves? A. They require a medium in which to travel B. They can travel through a vaccum C. They can travel only through solids D. They can travel through gases

The force of attraction or repulsion between charged objects depends

If a car travels a distance of 60 miles in 1 hour what is the speed average speed of the car miles per hour

Does weight increase decrease or stays constant as altitude increases

A body is moving with a velocity of 12m/s and it comes to rest in 2 minutes, what was the acceleration?

How can you find magnitude of velocity from a displacement time graph of an object?

Consider two rocks with masses of 1 and ten kilograms. What is the relation between their inertia's? Between their masses? Between their weights on earth?

If a cart of 4 kg mass has a force of 8 newtons exerted on it, what is its acceleration?

Why does the liquid thermometer work?