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____ is the amount of energy used to perform a task / or the measurement of the energy used to perform a task.
changes back and forth from potential to kinetic energy
when a roller coaster goes up a hill and then goes down the hill and up and down, it ______.
___ transform electrical energy into other kinds of energy such as thermal, light or mechanical.
wires and cables
Electrical energy is sent thru _____ to homes and businesses, and then electrical devices transform this electrical energy to light
___ is a dark area that is created when an opaque or translucent object blocks the passage of light.
distance and angle
The size of a shadow is affected by the ____ between the light source and the object.
a ___ transforms electrical energy to light or heat as it slows electrons in an electrical circuit.
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