If the mass of a material is 42 grams and the volume of the material is 15 cm^3, what would the density of the material be? answer: Unit:

Water that is stored behind a dam is used to generate electrical energy. The process involves multiple transformations. For each step listed, determine the energy transformation that occurs. Lake water flows downward through tunnels.

Two charges are separated by 3 meters. If each charge is 2 pC, what is the force by one charge on the other?

You see lightning and hear the thunder 6.0 seconds later. If the speed of sound is 340 m/s, how far away was the lightning? 2040 m 6120 m 58 m 24.5 km 0.0176 m

What is the kinetic energy of a 1.00g hailstone falling at 8.50m/s

Most substances dissolve A. at a constant rate regardless of heat transfer. B. more quickly as heat is removed from them. C. at the same rate as all other substances. D. more quickly when heat is added to them.

Ian walks 2 km to his best friend's house, then walks 0.5 km to the library. He then makes a 2.5 km walk home. The entire walk took him 3 hours. What is his average speed in km/h? SHOW YOUR WORK!

What would happen if earth gravity suddenly disappeared?

How many layers of material were the roads made of? a. two c. four b. three d. five

Red light has a shorter wavelength than yellow light.

Approximately what is the parallax angle of a star that is 20 light-years away?