What is the difference between the energy of spring A, stretched 0.6 meters, and spring B, stretched 0.3 meters, if they have the same spring constant?

What happens to mass and energy in a closed system?

Which substance represents a compound? (1) C (s) (3) CO (g) (2) Co (s) (4) O2 (g)

The word weather is most commonly used to refer to the state of the atmosphere at a certain time. Why do you think the same word is used to refer to the breakdown of rocks?

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it passed?

Jim poured Diethyl ether into a flask and taped a road flare to it. What would happen if he lit the flare and threw the flask?

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?

Condension occurs in the inside of your windows in Winters, why?

How can you use Hess's law to determine a reaction's enthalpy?

7. How much energy in KJ is released when 15.0 g of steam at 100.0 degrees Celsius is condensed and then frozen to ice at 0.0 degrees Celsius?