5.) A rock with a mass of 5-kg and moving at 20 m/s collides head on with a 10-kg rock. After the collision, both rocks come to rest. Determine the initial velocity of the 10-kg rock.
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In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

Acapacitor is storing energy of 3 joules with a voltage of 50 volts across its terminals. a second identical capacitor of the same value is storing energy of 1 joule. what is the voltage across the terminals of the second capacitor?

It takes a lot of energy to get the temperature of water to increase and eventually boil because water has a high heat.