In the diagram below, a stationary source located at point s produces sound having a constant frequency of 512 hertz. observer a, 50 meters to the left of s, hears a frequency of 512 hertz. observer b, 100.0 meters to the right of s, hears a frequency lower than 512 hertz. a) observer a is stationary, and observer b is moving away from point s. b) observer a is stationary, and observer b is moving toward point s. c) observer a is moving away from point s, and observer b is stationary. d) observer a is moving toward point s, and observer b is stationary.

What component of earth’s atmosphere exists entirely as a result of photosynthesis?

An charge with mass m and charge q is emitted from the origin, (x, y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.

The diagram shows a boulder rolling down a hill into a valley and then up the opposite hill. at which position does the boulder have the greatest kinetic energy? ab c d