how does either an increase in temperature or a decrease in temperature affect the density of a liquid or gas

A rock is dropped from a bridge. what happens to the magnitude of the acceleration and the speed of the rock as it falls?

What happens to light as it moves at an angle into a medium that has a lower index of refraction? A. It slows down, and the angle increases. B. It speeds up, and the angle increases. C. It speeds up, and the angle decreases. D.

True or false: If an object has twice the size of another object, it has half the weight

Two children playing on a frictionless garden gate invent a new game called "gate". The idea is that they will get on opposite sides of the gate and each push such that the gate does not move.

If Ike notices that there is a new moon tonight, when should he expect there to be a new moon again?

What are some ways the oceanic crust and the continental crust are alike?

Why is gangue sometimes reprocessed.

4.7 cm. The tube is sealed at one end and loaded with lead shot to give it a total mass of M = 130 g. The tube floats in water (of density 1 g/cm3) in vertical position, loaded end down.

Why is it incorrect to say that vascular tissue, gametophytes, and fronds are all found mosses

Can the validity of a model be limited, or must it be universally valid? How does this compare to the required validity of a theory or a law?