The nature of energy Flashcards
what is energy?
defined as the capacity to do work
when is work done?
whenever a force is applied to an object to set it in motion
what is heat energy?
can change a solid to a gas
what is light energy?
can create an image by causing the chemicals on a piece of film to react
what is electrical energy?
can turn on a motor, plate a set of flatware with a layer of silver or store data on a hard drive
what is chemical energy?
in food it provides the energy humans need for life functions. It heats our buildings when we burn oil, gas, coal or wood.
what is nuclear energy?
from breaking apart the nuclei of atoms provides energy to produce electricity or power a submarine.
what is mechanical energy?
turns the axles of a car or the blades of energy
what has energy?
anything that can force matter to move, change direction or change speed
what does the law of conservation of energy state?
that energy can neither be created nor destroyed, it can only be changed in form
what is potential energy?
an object has potential energy because of its position
what is kinetic energy?
the energy of motion
what is power?
the rate of doing work or consuming energy
