Which of the following is NOT a factor that affects the apparent brightness of a star as seen from Earth?

A. how old the star is

B. how big the star is

C. how hot the star is

D. how far away the star is

Describe at least two ways that your understanding of the Doppler effect could be applied to everyday life

If you increased the momentum of an object without increasing it inertia then what do you have

A steel sphere sits on top of an aluminum ring. The steel sphere (a = 1.1 x 10^-5/degrees celsius) has a diameter of 4.000 cm at 0 degrees celsius. The aluminum ring (a = 2.4 x 10^-5/degrees celsius) has an inside diamter of 3.

A 123 N crate with a mass of 12.6 kg is sitting on a shelf that is 4.9 m above the factory floor. What is the potential energy of the crate? Show all 3 steps. Be sure to include your units for each step and for your final answer.

Why does water have a high surface tension? Hydrogen bonding keeps water molecules close together. Water is a liquid at room temperature. Water molecules contain 18 electrons. The lengths of the bonds in water molecules can change.

A catcher "gives" with a baseball when catching it. If the baseball exerts a force of 475 N on the glove such that the glove is displaced 8.97 cm, how much work is done by the ball? Answer in units of J.

Which of the following is the best sign that cooking pancake batter causes a chemical change

The electric field near the earth's surface has magnitude of about 150n/c. what is the acceleration experienced by an electron near the surface of the earth? express your answer to two significant figures and include the appropriate units.

Minerals are considered to be Answer made out of rocks the building blocks of rocks extremely rare and valuable difficult to find

the solubility product of lead fluoride is 3.6 x 10-8. what is its solubility in 0.10M NaF solution, in grams per liter