The specific gravity of upper mantle rock is:

A. 2.7

B. 3.0

C. 3.3

D. 5.5

A well-thrown ball is caught in a well-padded mitt. If the deceleration of the ball is 2.10*10^{4} 4 m/s^{2} 2, and 1.

How much greater is the shaking produced by a magnitude 8 earthquake than a magnitude 5 earthquake using the Richter Scale? a. 10,000 times greater b. 100 times greater c. 3,000 times greater d. 1,000 times greater

Which of the following units could be used for the average speed of an object? A. kilometers per hour (km/hr) B. miles per hour (mi/hr, mph) C. meters per second (m/s) D. all of these

Which is a way that acoustic engineers attempt to limit the destructive interference of reflected sound waves in an auditorium?

What is the equation for calculating a machine's efficiency? I searched all over my textbook and couldn't find it, so I decided to post my question here.

Can a body be in equilibrium if only one external force act on its? explain

When sugar is poured from the box into the sugar bowl, the rubbing of sugar grains creates a static electric charge that repels the grains, and causes sugar to go flying out in all directions. If each of two sugar grains acquires a charge of 1.

You rub a clear plastic pen with wool, and observe that a strip of invisible tape is attacted to the pen. Assuming that the pen has a negative charge, which of the following could be true? Select all that apply.: A.

Magnet a has twice the magnetic field strength of magnet b and at a certain distance pulls on magnet b with a force of 100 n. the amount of force that magnet a exerts on magnet b is

A heavy sled and a light sled, both moving horizontally with the same speed, suddenly slide onto a rough patch of snow and eventually come to a stop.