As an astronaut, you land on an asteroid and observe that your weight is 250 N. If you know that your mass on Earth is 50 kg, what must be the force of gravity on the asteroid? SELECT AN ANSWER

0.2 m/s2

2.5 m/s2

5 m/s2

25 m/s2

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?

(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.