What is the conversion factor between km/h2 and m/s2?

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?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

What part of the ear is names after tools, such as the hammer and the anvil?