A rower in a boat pushes the water using an oar. What are the forces in the force pair for this example?
A ) the force the oar applies to the water
the force the water applies to the oar
B ) the force the oar applies to the water
the force the water applies to the boat
C ) the force the oar applies to the rower
the force the water applies to the boat
D ) the force the oar applies to the rower
the force the water applies to the oar

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2