Which is not an example of an energy conversion?

a. electrical energy runs through a wire to a 60 watt bulb producing light.
b. the chemical energy in one metric ton of crude oil is equivalent to 42 billion joules of energy.
c. potential energy in a boulder situated 10 m above the ground becomes kinetic energy as it falls.
d. the chemical energy in an apple changes to 45 j of mechanical energy in the contraction of a bicep muscle.

what is energy?

a. the ability to do work
b. the force acting on an object
c. the product of mass and acceleration
d. the rate of change of the speed of an object

which of the following statements about energy is correct?

a. energy is a vector quantity.
b. energy is the force used to move an object.
c. energy is required to set an object in motion.
d. energy can be stored, but it can never be transformed or transferred.

when you look at a process using the point of view of energy as opposed to the point of view of forces, typically

a. you use the exact same equations.
b. you predominantly use vector quantities.
c. you use more math, but it's less abstract.
d. you use less math, but it's more abstract.