The number of times that a wave vibrates in a unit of time is called

A. amplitude

B. frequency

C. wavelength

D. interference ... ?

Which of the following is defined as displacement over change in time? A. Speed B. Acceleration C. Velocity D. Displacement

How have physicists played a role in history? A. Physics has changed the course of the world. B. History books are written by physicists. C. Physicists have controlled most governments. D. Most decisions about wars are made by physicists.

Why should a tennis player "swing through" when hitting a tennis ball?

An object is hanging by a string from the ceiling of an elevator. the elevator is moving upward with a constant speed. what is the magnitude of the tension in the string? an object is hanging by a string from the ceiling of an elevator.

The outward rush of gases from the bomb's site of origin can be as high as what? 100 mph 500 mph 2000 mph 7000 mph

If you are trying to balance a seesaw and you have a higher mass on the left, should the mass on the right be placed at a greater distance or lower distance to balance it? Why?

A car travels 300 km in the first 3 hours of a trip. Then it hits traffic and travels only 60 km during the last hour. What is the average speed of the car? a.) 180 km/h b.) 100 km/h c.) 90 km/h d.) 120 km/h

What is the purpose of using a wedge? A. separates objects B. keeps objects together C. allows you to exert force over a distance

Echolocation is an acoustic principle in which some wildlife use resonance to find food at night. Question 25 options: True False

Use the drop-down menus to identify the variables for the second hypothesis. Hypothesis #2: As you build circuits, you will alter resistance, which is the y variable.