During convection of air currents,

a. all air rises.

b. cool air sinks.

c. warm air sinks.

d. air is cooled by a heat source.

Are many common foods we eat more likely to be acidic or basic

What's an air column

What is the equivalent resistance for a series circuit with three resistors 19.2 ohms 24.6ohms, and 31.2 ohms?

A 15 kg mass is moving at 7.5 m/s on a horizontal, frictionless surface. What is the total work that must be done on the mass to increase its speed to 11.5 m/s?

When using levers like scissors or hedge clippers, what can be done to increase the cutting force so that you don't have to squeeze so hard?

The gamma ray released by each decay carries 140kev of energy. find the total energy e released by decays in the 2 hours.

Think of the last five things you read. Now think of a type of reading you havent done recenty have never read. What kind of pattern do you see in your reading? What is your favorite type of reading and your least favorite type of reading?

Consider this statement: Air is matter. Which facts best support the statement? A. Balloons can be filled with air. B. Air is essential for life to exist. C. Air has mass. D. Air is not an element. E. To float on air is to be happy. F.

Hydroelectric power uses: wind water coal the sun

Two lightweight metal spheres are suspended near each other from insulating threads. One sphere has a net charge; the other sphere has no net charge. The spheres will: A. Attract each other B. Exert no electrostatic force on each other C.