What is the smallest unit that makes up matter

Explain how changing protons, neutrons, and electrons affects atoms

Primary colors of light?

As a tractor pulls a plow across a field, it exerts a force on the plow in the forward direction. What is the "equal and opposite force" in this interaction, according to Newton's third law?

A force of 100,000 N is applied to an iron bar with a cross-sectional area of 10 mm 3 20 mm and having a yield strength of 400 MPa and a tensile strength of 480 MPa.

If you divide a force measured in newtons (1 newton = 1 kg*m/s^2) by a speed expressed in meters per second, in what units will the answer be expressed?

For a vacation, you and your family fly east to west from Boston, Massachusetts, to Seattle, Washington. You notice that your flight back home to Boston is shorter than your flight to Seattle. Which phenomenon causes your flight home to be shorter?

You spy on an anchor on the bottom of a lake. What is the direction and amount of force the water exerts on it: a) zero b) up, equal to the weight of the anchor. c) up, less than the weight of the anchor d) down, equal to the weight of the anchor.

How are electromagnetic waves different from matter waves?

A dc generator is the same as a (n) a. electric motor. b. ac generator. c. armature. d. electric current.

Which of the following best describes scientific knowledge A.) Durable B.) Absolute and never changing C.) Frequently varies