When galaxies move away from us they appear to have a "red shift" in color. Explain why this happens.

In triangle ABC, the angles A and B have the same measure, while the measure of angle C is 21degrees larger than the measure of each of A and B. What are the measures of the three angles?

You need to purchase a motor to supply 400 joules [J] in 10 seconds [s]. All of the motors you can choose from are 80% efficient. What is the minimum wattage [W] on the motor you need to choose

What is it called when a gas is squeezed into a smaller space

It was a calm and cloudy day in a Utah town located near mountains. Suddenly the clouds grew dark and heavy, and a storm covered the town in a blanket of snow. Explain with details what would cause the weather to change suddenly like this?

Tarzan swings back and forth on a long vine with a period of 7.27 s. how long is the vine? (unit=m)

Atmospheric conditions near a mountain range are such that a cloud at an altitude of 2.00 km contains 3.20 ✕ 10^7 kg of water vapor. How long (in years) would it take for a 2.

In addition to the conditions required for any solar eclipse, what must also be true in order for you to observe a total solar eclipse?

Protons and neutrons strongly attract when they

How far is Jupiter from the sun?

Steam moves into a cylinder of a steam engine at a constant pressure and does 2.34 J of work on a piston. The diameter of the piston is 3.4 cm and the piston travels 4.6cm. What is the pressure of the steam?