A man walks 7 km, east in 2 hours and 2 km in 1 hour in the same direction. a) what is the man's average speed for the whole journey? b) what is the man's average velocity
for the whole journey?

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?

Bonds within one water molecule are examples of

Element with 3protons and 5neutrons