Which best compares scissors and a seesaw?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

What is the final velocity of the initial velocity of 25 and -50?

Agas expands from an initial volume of 0.040 m^3 and an initial pressure of 210 kpa to a final volume of 0.065 m^3 while its temperature is kept constant. how much work is done by the system?