A pulley is used to lift a heavy mass from the floor to a platform. The IMA of the system is 5 and the AMA is 2.5. What is the efficiency of the system?

Consider the gravity of the four spheres. If we wanted sphere C to attract the other three spheres, what is one feature of sphere C we must change? A) Increase its mass. B) Make it less dense. C) Increase its diameter. D) Change its composition.

The owners want the speed at the bottom of the first hill doubled. How much higher must the first hill be built?

If The Universe Is Expanding, What Is Outside? If There Is Nothing Outside It, How Does It Expand To Create Void?

In the northern hemisphere the magnetic compass will normally indicate a turn toward the west.

If a substance containing charged ions and electrons can be compressed so that the particles have less space between them, the substance is a gas. plasma. solid. liquid.

Why is velocity most important in space launch?

A person walks up a stalled escalator in 25 s. When standing on the same escalator, now moving, she is carried up in 16 s. How much time in seconds would it take her to walk up the moving escalator?

Does the temperature increase during melting yes or no

Is this statement true or false? The next generation of nuclear power plants being built in California and South Africa are even safer and more efficient than previous generations of power plants.

Part C At what speed does the wreckage move if one car was driving north and one east? Express your answer to two significant figures and include the appropriate units. ! HA C ? Value Units Submit Request Answer Provide Feedback