Astronomers believe the moon used to be much closer to the earth (mass = 5.98 x 10^24 kg). When it was at 1.92 x 10^8 m, half its current distance, what was its orbital seed?

Which of the following is associated with fusion but not fission? OA. Radioactive waste OB. Mass-energy equivalence OC. Uranium OD. Hydrogen

Explain why a Chef in a very busy restaurant would prefer a copper pot over an aluminum pot. A) The copper pot would heat faster because it has a lower specific heat value.

This is a measure of the average kinetic energy of a substance.

The diagram shows a person holding a bow and arrow. Which will most likely increase the kinetic energy in this system? pulling farther back on the string releasing the string holding the arrow higher decreasing the mass of the arrow

The smallest known galaxy, Segue 2, has an approximate radius of 1.05 * 1015 kilometers. Use the conversion factors 1 light-year = 9.5 * 1012 kilometers and 1 parsec = 3.262 light-years to convert this distance from kilometers to parsecs.

Which devices might use electromagnets? pick all that apply. 1. audio speakers 2. plastic combs 3. trains 4. doorbells 5. revolving chairs 6. cranes

Match each type of line or symbol, common to geologic maps, to its description. 1. Fault Line A. very dark and thick line 2. Contact Line B. very light and thin line 3. Axis Fold C. look like a stubby T 4. Strike and Dip D.

You drop your backpack out of a window from a height of 8.3 m. What is the impact speed of your backpack? A. 163 m/s B. 1.2 m/s C. 21.3 m/s D. 12.8 m/s

What is the kinetic energy of a car that has a mass of 1,600 kg and is moving at 22 m/s?

Which is an example of a transverse wave? A. sound B. electromagnetic C. water D. seismic waves