When was the first ozone hole discovered

A motor is used to lift a person sitting on a platform that, combined weighs 650 N. The platform is lifted 25.0 m straight up in 18.0 seconds. What power is developed by the motor in watts?

A person weighing 0.6 kN rides in an elevator that has a downward acceleration of 1.3 m/s 2. The acceleration of gravity is 9.8 m/s 2. What is the magnitude of the force of the elevator floor on the person? Answer in units of kN.

If equal force were applied to a basketball and a baseball, which would travel further, according to Newton's 2nd law of motion?

A marble slab is 1 metre long and has a rectangular cross section of area 15cm squared. what is the volume of the marble slab?

Can you die if you bust a hemorrhoid?

A standing wave is established in an organ pipe that is closed at one end. What is located at the open and closed ends of the pipe?

When all parts of a circuit are composed of conducting materials, the circuit is said to be A. parallel. B. closed. C. open. D. shorted.

You travel an an average speed of 20 km/h in a straight line to get to your grandmothers house. It takes you 3 hours to get to her house. How far away is her house from where you started?

A boat with an anchor on board floats in a swimming pool that is somewhat wider than the boat. Does the pool water level move up, move down, or remain the same if the anchor is (a) dropped into the water or (b) thrown onto the surrounding ground

In July 2005, NASA's "Deep Impact" mission crashed a 372-kg probe directly onto the surface of the comet Tempel 1, hitting the surface at 37,000 km/h.