A bicycle and its rider have a combined mass of 80 kg and a speed of 6 m/s. What is the magnitude of the average force needed to bring the bicycle and its rider to a stop in 4 seconds?

3/4 of pan of brownies was sitting on the counter you decided to eat 1/3 of the brownies in the pan how much of the whole pan of brownies did you eat

Comet. is a A.) remnants of a planet that never formed B.) is mostly made up of ice C.) something that has landed on Earth main asteroid belt A.) remnants of a planet that never formed B.) is mostly made up of ice C.

Calculate the calories lost when 95 g of water cools from 45 ∘C to 29 ∘C. Express your answer to two significant figures and include the appropriate units. Use abbreviations for the units.

According to Ptolemy's model of the movement of celestial bodies, A. the sun is the center of the universe. B. the earth rotates around the moon. C. planets orbit in circular paths around the earth. D. the earth rotates around the sun.

Two bumper cars collide and then move away from each other. The forces exerted are: A. Equal and opposite B. Opposite C. Equal

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.