Does friction depends on the nature of two syrfaces which are in contact with each other

Which best describes what a refrigeration system would do? It adds cold air through the room. It moves the thermal energy to another place. It allows coolant to release cold air into the room. It transfers energy from the ground.

One major advantage of alternating current over direct current is that you can use alternating current with a device known as a transformer.

The compass of an airplane indicates that it is headed due north and its airspeed indicator shows that it is moving through the air at 240 km/hr. If there is a wind of 100 km/hr from west to east.

Waves that require a medium through which to travel are called electromagnetic waves True or False?

What is meant by "elastic collisions"? A.) heat given off by constant collisions B.) compression of the gas C.) resultant force of all combined collisions D.) collisions and rebounds without loss of energy

13. Which best summarizes the change in number and size of microcontinents during the Proterozoic? a. the number of microcontinents increased and the size increased b. the number of microcontinents increased and the size decreased c.

What is the 3d model of oxygen molecule

If you need to drive from Dallas, Texas, to Salt Lake City, Utah, (about 1500 miles), and the speed limit is 60 miles per hour most of the way, what is the least amount of time you will need? A. 4 hours B. 25 hours C. 2.5 hours D. 90,000 hours

Which of the following statements about the Coriolis effect is correct? a. The Coriolis effect is not affected by wind speed. b. The Coriolis effect is weakest at the poles. c. The Coriolis effect does not affect wind direction. d.

What force would be needed to make a 10kg bowling ball accelerate down the alleyway with an acceleration of 3m/s2