An airplane starts at rest and accelerates down a runaway for 20s. At the end of the runway, its velocity is 80m/s north. What is its acceleration?

Which best defines energy

A 1.8-m uniform rod is being used to balance two buckets of paint. One pucket is full, but the other is mostly empty, and has only 0.25 the inertia of the full bucket. How far away from the full bucket is the center of mass of the system located?

True or false: Heterogeneous materials contain visibly different materials

The largest diversity of plants and animals on the planet is found in one terrestrial biome. True or false

Which wave phenomenon makes it possible for a player to hear the sound from a referee's whistle in an open field even when standing behind the referee?

Which statement would be a valid argument in favor of using nuclear power? There are few negative impacts from mining the fuel. Reactors are safe from natural disasters. There are little to no waste products from fission.

How would you convince somebody that the momentum of an isolated system is constant?

Object A has a charge q on it, object B has a charge q on it, and Object C has a charge 2q on it. These charges are arranged, one each, at the vertices of an equilateral triangle. Which charge has the greatest magnitude electric force on it? a. Ab.

How can Newton's laws be used when addressing the motion of objects?

A plastic rod rubbed with a duster attracts bits of paper becauseof a what force