What is albert einstein’s contribution to the understanding of nuclear energy?

he proposed that matter can be converted to energy and vice versa.
he first discovered that nuclear-reaction products are lighter than the reactants.
he developed the use of nuclear reactions to generate electricity.
he demonstrated that a uranium nucleus splits and releases neutrons.

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

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.