A student pushes a 12.0 kg box with a horizontal force of 20 N. The friction force on the box is 9.0 N. Which of the following is the best approximation of the box's acceleration?

Which best describes how magnesium (mg) and oxygen (o) bond? they form an ionic bond by exchanging two electrons. they form an ionic bond by exchanging three electrons. they form a covalent bond by sharing one electron.

Use the diagram below for questions #28 and 29. 28. In the diagram above, which symbol represents the light bulb? 29. In the diagram above, which symbol represents the battery? Use the diagram below for questions #28 and 29.

Which of the following is not true about centripetal force? Check all that apply. A. It's the same as centrifugal force. B. It's also called an inward force. C. Centripetal force keeps a car on the road going around a curve. D.

What are the two possible outcomes for a Blue Supergiant

A student times how long it takes different liquids to vaporize when placed in a vacuum chamber. Most vaporize within a few seconds. How should the student time the vaporization?

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