A tunnel under a river is 2.00 km long. (a) At what frequencies can the air in the tunnel resonate? (b) Explain whether it would be good to make a rule against blowing your car horn when you are in the tunnel.

An object is shot upwards, from the ground, with an initial velocity of 120 m/s. How high will it be after 4. Os?

What happened from the mid 1700s to the mid 1800s that contributed to the change in the global human population?

How long can you play tennis on the 949kJ of energy in a candy bar? Assume that the average power consumption for a person playing tennis is 440W.

What is the mass of a pure platinum disk with a volume of 113 cm3? the density of platinum is 21.4 g/cm3

The coefficient of static friction between a block and a horizontal floor is 0.40, while the coefficient of kinetic friction is 0.15.

If the electrons in an atom were stationary, they would be ___ the nucleus

If the distance between two charges is increased to three times the original distance, how will the electrical force between the charges compare with the original force? A) It will increase to three times the original force.

A cylindrical metal can is to have no lid. It is to have a volume of 125π in3. What height minimizes the amount of metal used?

Which components of the atom have no charge? protons neutrons electrons none of the components have charges

An unknown solution has a pH of 8. How would you classify this solution? A) The substance is an acid. B) The substance is a base. C) There is not enough information to answer the question.