In a heat engine, if 700 j of heat enters the system, and the piston does 400 j of work, what is the final internal (thermal) energy of the system if the initial energy is 1,200 j? 1,100 j 1,500 j 900 j 300 j

If a spring has a k value of 100 newtons per meter and it is stretched 0.50 meters, what is the restoring force of the spring?

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

When conducting an investigation to determine which type of fertilizer produces the most flowers on a plant, which variable would be graphed on the x-axis once you collected the data? a. type of fertilizer b. amount of flowers c. amount of water d. number of days that the plants grew