What is power?

A. The efficiency of a machine

B. The number of machines used

C. The amount of work done

D. The rate of doing work

A net force of 30 N is applied to an object with a mass of 15 kg. The object accelerates at 2 m/s2. If half the force is applied, what happens to the acceleration?

How far will the cow travel in 35 seconds?

Why the sun cannot be a huge ball of fire?

What do waves carry from place to place

A rectangular metal bar has length of 20cm, width of 5cm. Mass of the block is 2kg and its density is 5000kg/m3. Find the height of the metal bar.

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.

What conversion factor is needed to change from kilometres to meters

What does the law of universal gravitation state?