A washing machine uses 1.8 × 105 watts of power. If it is in use for 2 hours per day (on average), how many kilowatt hours will it use in 30 days? A. 1.1 × 104 kilowatt hours B. 36 kilowatt hours C. 18 kilowatt hours D. 540 kilowatt hours E. 1.1 × 106 kilowatt hours

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?

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

An object's buoyant force and weight mean the same thing.a. trueb. false