27. Find the acceleration of a particle moving with a con-

stant speed of 8 m/s in a circle 2 m in radius.

Compare the atmospheres of Mars and Venus. Mars is rich in oxygen, like ours, accounting for its red surface. Like Earth, nitrogen is the chief atmospheric gas. Both are too hot for water to now exist as a liquid at the surface.

Where are waves found in nature? Sound Water Light All of the above

What are the two factors that affect the frictional force between two surfaces?

Compare and contrast power and work.

Blank creates a magnetic field and blank creates electricity

During eccentric muscle contraction, the muscle

What is a string theory?

When a sound source is moving away from an observer, the observer will hear a lower pitch. This is due to

What is the difference between a meteorite and a asteroid?

Which of the following best explains why a magnet sticks to a refrigerator? the magnet is