A star's apparent magnitude is most closely related to which of the following? Select all that apply.

a. radius.

b. luminosity.

c. distance from Earth.

d. absolute magnitude. E. surface temperature.

The difference in what causes air movement of high - and low-pressure areas density clouds precipitation atmosphere

Sound waves travel through air at a speed of 330 m/s. A whistle blast at a frequency of about 1.0 kHz lasts for 2.0 s.

The rotting of wood is an example of which of the following reactions?

What are two factors that can produce metamorphic rocks

Particle A of charge 3.06 10-4 C is at the origin, particle B of charge - 5.70 10-4 C is at (4.00 m, 0), and particle C of charge 1.08 10-4 C is at (0, 3.00 m). We wish to find the net electric force on C.

A book rests on a table, exerting a downward force on the table. the reaction to this force is:

Steve hears a siren emitting a frequency of 10 kHz when it is at rest. What frequency will Steve hear if the siren moves toward him at 30 m/s? Assume the speed of sound is 340 m/s. Answer options are: a. 11 kHz b. 10 kHz c. 0 kHz d. 9 kHz

What is the efficiency of a machine that has work input of 40 joules and work output of 35 joules

What happens to an object if the forces acting on it are unbalanced?

A 92-kg astronaut and a 2000-kg satellite are at rest relative to a space station. the astronaut pushes on the satellite, giving it a speed of 0.14 m/s directly away from the station.