A wave with a period of 0.008 second has a frequency of

A. 80 Hz.

B. 125 Hz.

C. 800 Hz.

D. 12.5 Hz.

Electromagnetic force is present when electromagnetic fields A. Become charged as they lose electrons B. Become stable as they come in contract with other forces C. Interact with charged particles D. Gain energy from other forces

Difference between force and weight

Which of the following rocks would most likely be found on the ocean floor

Which of the following could you do to increase the strength of an electromagnet?

If you push your chair across the floor at a constant velocity how does the force of friction compare with the force you exert?

Calculate the maximum acceleration of a car that is heading up a 4º slope (one that makes an angle of 4º with the horizontal) under the following road conditions.

The two main parts of a wave are the a. swell and whitecap. c. crest and trough. b. wavelength and wave height. d. rise and dip.

A block of mass m=16.8 kg is sliding on a surface with initial velocity v=23.2 m/s. The block has a coefficient of kinetic friction μk = 0.426 with respect to the surface and is being pushed by a force of magnitude F=86.

Two children are pulling and pushing a 30.0 kg sled. The child pulling the sled is exerting a force of 12.0 N at a 45o angle. The child pushing the sled is exerting a horizontal a force of 8.00 N. There is a force of friction of 5.00 N.

Describe what a planetesimal is. Is it related to a protoplanet?