The surface temperature of a star can be estimated based on the star's

a. size.

c. age.

b. color.

d. mass.

A bullet whose mass is 30.2 g leaves a rifle with a muzzle velocity of 1,000 m/s. It strikes a block of wood (mass 5 kg), initially at rest, and remains embedded in it.

Using a simple machine, a student is able to lift a 500N weight by applying only 100N. What is the mechanical advantage of the simple machine? A) 0.2 B) 1 C) 5 D) 50000

Which particle determines the type of element you have.

How much work is done by a resistor in 2 seconds, as a 10V current passes through it at 2 columbs per second?

Currents during lightning strikes can be up to 50000 A (or more!). We can model such a strike as a 47500 A vertical current perpendicular to the earth's magnetic field, which is about 12 gauss. a.

What is the purpose of a valve?

A particle travels 15 times around a 10-cm radius circle in 42 seconds. what is the average speed (in m/s) of the particle?

Where are the magnetic fields stronger near a bar magnet? A) Top B) Center C) Ends D) Bottom

You pull a simple pendulum of length 0.225m to the side through an angle of 3.50∘ and release it. Part A How much time does it take the pendulum bob to reach its highest speed? Take free fall acceleration to be 9.80 m/s^2.

What is the velocity of a wave having a frequency of 25 Hz and a wavelength of 10m