What is the common size for air mass? a. 600 km or less across b. 1600 km or more across c. 16000 km or more across d. 160000 km or more across

Explain using examples, what is simple harmonic motion and why it is an important area of study in physics.

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared