Through which one of the following mediums is the velocity of a sound wave the greatest?

A. Lead

B. Water

C. Air

D. Steel

How many times per day does the international space station-or any satellite in a similar low orbit-go around the earth?

In which situation will the lowest resistance occur?

Which sentence uses the underlined pronoun correctly? A. Grandmother cooked all of our a special dinner last night. B. Grandmother cooked all of we a special dinner last night. C. Grandmother cooked all of us a special dinner last night.

How does water flowing over a waterfall involve both kinetic energy and potential energy?

Which concept was supported by taking measurements of the same stars at night and then again during solar eclipses? gravitational lensing principle of equivalence gravitational time dilation gravitational redshift

The probability that a battery will last 10 hr or more is 0.8, and the probability that it will last 15 hr or more is 0.11. Given that a battery has lasted 10 hr, find the probability that it will last 15 hr or more

What is the sum of 9260 and 3240? Express your answer numerically to at least three significant figures.

What could you do if the plant is placed in your community and later leads to pollution beyond the amounts allowed by the EPA?

The friends now feel ready to try a problem. Suppose an Atwood machine has a mass of m1 = 2.5 kg and another mass of m2 = 8.5 kg hanging on opposite sides of the pulley. Assume the pulley is massless and frictionless, and the cord is ideal.

What are the 3 main branches of natural sciences