When density increases, what happens to the number of molecules in a volume of air?

How many electrons should be in an atom's valence shell (with the exception of hydrogen and helium) to become stable?

The earth's hydrosphere includes which of the following? oceans, rivers, and lakes the water in the air and underground the water in the atmosphere All of these

A tree is blown down by wind

A 0.426 kilogram football is kicked by a punter. If the applied force to the call is 62 Newton's what is the acceleration of the ball.

How much gold (Au) is extracted per ton of rock ore

Darna rolls the 7.05-kg ball down the lane and it hits the 1.52-kg pin head on. The ball was moving at 8.24 m/s before the collision. The pin went flying forward at 13.2 m/s. Determine the post-collision speed of the ball.

What is the acceleration caused by your push on the ball

In the chemical reaction in which carbon, hydrogen and oxygen absorb heat and combine to form carbon dioxide and water which of the following is considered to be a reactant? A. heat B. water C. oxygen D. carbon dioxide

A box is at rest on a table. What can you say about the forces acting on the box? The upward ___ and the downward___ are balanced Applied force Frictional force Normal force Drag force Gravitational force Tension

When the sun warms the sidewalk on a hot sunny day, what type of energy conversion occurs?