A sound has a higher pitch than a bell. Which quantity must also be higher in this sound than in the bell? O amplitude
O frequency
O wavelength
O speed

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Which changes of state do the labels represent? a: b: c:

What is an aquifer for science class