Which of the following is not a type of energy conversion process?

a. hydroelectric dam

c. windmills

b. solar cell

d. all are energy conversion processes

A ham radio operator broadcasts at a frequency of 3.0 * 108 Hz. The speed of an electromagnetic wave is a constant, 3.0 * 108 m/s.

Physics is explicitly involved in studying which of these activities?

When electromagnetic waves travel through a vacuum they do so with speeds that are

What is the term that describes how a plant responds to gravity

Which of the following should be used to sanitize and disinfect in educational or child care facilities

A machine shovel moves dirt at the rate of 1,100 pounds of dirt 1 foot in 1 second. How many horsepower is this?

Two descriptions about physical quantities are given below: Quantity A: It is a force. Quantity B: It changes when the object travels from Earth to Earth's moon. What quantities are these most likely describing? A.

How does the tilt of Earth's axis affect how the sun's rays strike Earth?

A stone is tied to s string and whirled around in a circle at constant speed. Is the string more likely to break when the circle is horizontal or when it is vertical? Account for your answer, assuming the constant speed is the same.

Two blocks, stacked one on top of the other, slide on a frictionless horizontal surface. The surface between the two blocks is rough, however, with a coefficient of static friction equal to 0.50. The top block has a mass of 2.