How is average speed best defined?

A) distance traveled in a certain amount of time

B) the time it takes to travel a certain distance

C) instantaneous speed

D) velocity

What is the energy that moves your arms and legs

What is 6.9 * 107 written in standard form? 0.00000069 0.000069 6,900,000 69,000,000

What is the formula for force

Which of the following wavelength regions can be studied with telescopes on the ground? A) radio, visible, and very limited portions of the infrared and ultraviolet regions B) all light with wavelengths longer than ultraviolet wavelengths C) all

A light beam approaches a plain mirror at an incident angle of 39 degrees. What is the angle of reflection?

Why is thermal energy from the Sun transferred to Earth through electromagnetic waves instead of any other type of thermal energy transfer? Electromagnetic waves can carry energy through matter. Electromagnetic waves can travel through empty space.

Why do different elements emit different colors of light

In an experiment, 108 J of work was done on a closed system. During this phase of the experiment, 79 J of heat energy was added to the system. What was the total change in the internal energy of the system?

J. J. Thomsons experiments provided evidence that an atom

How does our sun differ from most other main sequence stars?