Astronomers are comparing two stars that are known to have the same luminosity. Star A is observed to be 4 times brighter than star B. How far away is Star A compared to Star B?

You leave on vacation, but accidentally block the drain of your kitchen sink. The faucet is leaking at a rate of 3 mL every 10 seconds. The sink measures 18 inches wide by 18 inches long by 14 inches deep.

What type of force causes exfoliation

A 25,000-kg train car moving at 2.50 m/s collides with and connects to a train car of equal mass moving in the same direction at 1.00 m/s. How much does the kinetic energy of the system decrease during the collision?

Which direction does air pressure exert force at sea level

When someone throws a ball, the action force is the person pushing on the bar what is the reaction force?

Give a sentence with the word velocity in it

Which description matches up correctly with each type of particle? Alpha - no mass and no charge; beta - mass of 4 and charge of + 2; gamma - charge of - 1 and mass of 0 Alpha - mass of 0 and charge of - 1; beta - mass of 4 and charge of + 2;

Describe the factors that form deep currents

A comet is cruising through the solar system at a speed of 50000 kilometers per hour for 4 hours time. What is the total distance traveled by the comet during this time in kilometers, miles, and light years?

A gas in a closed container is heated with 12J of energy, causing the lid of the container to rise 3m with 5N of force. What is the total change in energy?