Based on the law of conservation of energy, which statement is false?
a. energy is lost when machines don't work right.
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b. we can't add more energy to the universe.
c. we can't destroy energy that exists in the universe.
d. energy changes from one form to another.

From the conservation of energy...

We can say that the total energy contained in the universe must be constant. No energy can be added or removed without that change being balanced out by an energy gain/loss elsewhere. This makes choices B and C true.

To balance out these changes in energy, it must change forms (like a planet orbiting a star exchanges some of its potential energy for kinetic energy and vice versa). This makes choice D true.

By process of elimination, the answer is choice A.

v=ir = 3x15 =45 v

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle