Sound travels fastest through

A scientist wants to learn about Earth's oceans. Which of the following spheres should she most directly study? a. Atmosphere b. Cryosphere c. Geosphere d. Hydrosphere

Identify two methods of active transport

The expression "Every action has an equal but opposite reaction" is often used in everyday speech. A local government may pass a law that is unpopular, which is the action, and some citizens later react by trying to get the law repealed.

Which of these indicates that a liquid has transferred thermal energy to the air?

During resistance exercise, muscles are what?

What is the electric potential of a 2.2 µC charge at a distance of 6.3 m from the charge? Recall that Coulomb's constant is k = 8.99 * 109 N • ___ V What is the electric potential at a distance of 99 m from the charge?___ V

what is a possible unit for the product VI, where V is the potential difference across a resistor and I is the current through the same resistor?

In old western movies, cowboys often would put their ear to a train track to listen for an oncoming train. What benefit would this method provide over listening for a train by listening for sound through the air? A) The sound would be louder.

What is meant by "reflecting" and "refracting" telescopes?

How would you find the speed of a ball thrown in to the air - it takes 6 seconds to get tho the top. The height is not given.