According to the laws of thermal radiation, hotter objects emit photons with .
a) a lower average frequency
b) a shorter average wavelength
c) a higher average speed
d) a lower average energy

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

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

Which statement best explains why the overall charge on an atom is zero?