Describe how a convection current is produced.

Which would show an example of how physical changes are reversible? cutting a gold bar in two pieces and then putting the pieces next to each other burning a match and then relighting it melting tin and then cooling it into a mold combining sodium

Which statement correctly describes mass-energy equivalence?

How do you express 78,000 in scientific notation? 7.8 x 103 7.8 x 104 7.8 x 10-4

What theory held that the earth was the center of the universe and that the sun, moon, and planets revolved around it?

For a bus with width=32Bits, speed=33MHz, what is the theoretical throughput in MiBytes? a. 32*33 * (10^6) / (2^20) b. 32/8*33 * (2^20) / (10^6) c. 32/8*33 * (10^6) / (2^20) d. 8*33 * (10^6) / (2^20)

The distance from home plate to the pitchers mound is 18.5 meters. For a pitcher capable of throwing at 3.85m/s (86mi/hr), how much time elapses between the release of the ball and the ball passing home plate?

A squirrel sitting on the ground starts to run with an acceleration of 5.1 m/s 2. How fast is the squirrel going after 0.25 seconds? A. 20.4 m/s B. 1.28 m/s C. 0.49 m/s D. 3.1 m/s

Describe how the competition between invasive and native species might affect a food web

Which vector should be negative? any vector whose magnitude is less than 1 a displacement in the direction North any vector whose magnitude is greater than 1 the velocity of a falling object

Acceleration is a scalar quantity true or false