What temperature is required to transfer waste heat to the environment for a heat engine to be 100 percent efficient?

a) 0°C

b) 0 K

c) 273 K

d) 212°F

A car moving 12 m/s stops in 3 seconds vf=

Which of the following is a change Michaela should make in her investigation in order to achieve more

A student performs experiements on acids and bases. What is not a scientific experiment

Deltas, canyons, and caves are all parts of Eath's what

A student thinks that scientific theories are not reliable sources of information, since scientists tend to argue about the details of them. What is the flaw in the student's reasoning?

11. Which of the following best explains velocity? A. The direction of an object in motion B. Only the change of direction of an object in motion C. The speed and direction of an object in motion D. The speed of an object in motion

Using 6400 km as the radius of Earth, calculate how high above Earth's surface you would have to be in order to weigh 1/16th of your current weight. Show all work leading to your answer OR describe your solution using 3 - 4 complete sentences.

Which of these could occur if a switch is closed? A. A light bulb will light up. B. A hair dryer will turn off. C. A computer will shut down. D. B and C

When you throw a ball the work you do to accelerate it equals the kinetic energy the ball gains?

Old-fashioned heating systems sent steam into radiators in each room of a house. in the radiators, the steam condensed back to water. analyze this process and explain how it heated a room.