Which of the following is true of a light-year(ly)?

A) It is a unit of time.
B) It is a unit of mass.
C) It is a smaller unit of distance than kilometers.
D) It is a larger unit of distance than the astronomical unit.


D

Physics & Space Science

You might also like to view...

Water ripples are produced by making a cork oscillate up and down at a frequency of 5 Hz. The peaks of the ripples are 0.03 meters apart. What is the speed of the water ripples?

Physics & Space Science

A mass of 0.40 kg, hanging from a spring with a spring constant of 160 N/m, is set into an up-and-down simple harmonic motion. What is the speed of the mass when moving through the equilibrium point? The starting displacement from equilibrium is 0.10 m

a. zero c. 2.0 m/s b. 1.4 m/s d. 3.4 m/s

Physics & Space Science

Glass panes are opaque to a certain type of radiation, which can cause sunburn. What type of radiation is it? This radiation is important in ozone layer reactions

a. gamma c. X-ray b. ultraviolet d. microwave

Physics & Space Science

Which of the following statements best describes the line of stability?

a. It has N = Z when A = 240. b. It has Z > N at A = 240 c. N always tends to be greater than Z. d. N tends to be greater than Z, especially for masses greater than calcium.

Physics & Space Science