What must exist for electric charges to flow?

electric potential or electric potential difference

True or False Temperature is the flow of heat energy from one object to another.

Which of the following are appropriate acceleration units?

Water Cycle 1. True or False: The earth always has the same amount of water because it is constantly forming more water AND losing water at similar rates.

Which of the following is not a requirement of practical fuel

How did the angel of the pendulum affect the period

Which of these rocks are formed by volcanic activity? select the two correct answers. a. marble b. basalt c. limestone d. granite e. sandstone

Which source is most likely an authority on the subject? Dr. Vale, a pediatrician, discusses electrical circuitry on her home-improvement website. Jonah, an amateur cook, teaches his son how to make the best grilled cheese sandwiches.

What methods can be used to break down substances into elements

8. A gas is contained in a horizontal piston-cylinder apparatus at a pressure of 350 kPa and a volume of 0.02 m3. Determine the work done by the piston on the gas if the cylinder volume is increased to 0.15 m3 through heating.

A 75.0 kg person stands on a scale in an elevator. (a) What does the scale read (in N and in kg) when the elevator is at rest?