Elect the correct answer. The potential energy for a mass on a spring is proportional to the square of which of these quantities?
ОА
mass
ОВ.
frequency
O C. period
OD. displacement
O E. velocity

Why are some galaxies’ spectra blueshifted rather than redshifted? question 4 options:

Observations show that interstellar clouds can have almost any shape and

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.