Sound originates when a disturbance sends a through the surrounding medium.
electromagnetic wave

vibration

photon

nerve impulse

Which of the following represents an upside-down image?

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?

When does your body conduct current more readily?