A train passes a stationary observer. Which of

the following best describes how the amplitude

and the apparent frequency of the sound waves

heard by the observer change as the train moves

away?

High pitch sounds are characterized by song waves that have a

Which of the following situations would cause light to refract? A. traveling through a vacuum B. passing from one glass block to another C. moving through the air D. moving from air to water

A car accelerates uniformly from + 10.0 m/s to + 40.0 m/s over a distance of 125 m. How long did it take to go that distance? Show all your work, including the equation used, given and unknown quantities, and any algebra required.

Given the speeds of each runner below, determine who runs the fastest. Emily runs 15 feet per second. Jake runs 109 feet in 8 seconds. Stephanie runs 1 mile in 467 seconds. Tony runs 760 feet in 1 minute. A. Emily B. Jake C. Stephanie D. Tony

An object has an acceleration of 24 m/s/s. How long would it take the stationary object to reach a velocity of 6.8 m/s?

Fluorine-21 has a half-life of approximately 5 seconds. What percentage of the original nuclei would remain after 20 seconds

Which of these is an example of a totalitarian regime A.) Canada under prime minister Trudeau's rule B.) the Soviet Union under Josef lo

Since 1 pound = 4.45 newton, what is your earth weight in newtons?

A girl moves at 2m/s delivering newspapers. she throws a newspaper directly behind her at 2m/s. in the frame of reference of someone standing nearby what is the motion of the newspaper.

What forces are acting on matter through contact or no contact