forces 4 Flashcards
(20 cards)
where is kinetic energy stored?
moving objects
where is gravitational potential energy stored?
objects due to height
where is nuclear energy stored?
inside the nucleus
where is chemical energy stored?
inside chemical bonds
where is heat energy stored?
hot things
how is light energy transferred?
light waves
how is sound energy transferred?
soundwaves
where is elastic potential energy stored?
objects that are squashed or stretched
where is electrical energy stored?
electrical circuits
what happens to waste energy?
it is dissipated into surroundings
what is the law of conservation of energy?
energy cannot be created or destroyed only transferred
what are the units for work done?
joules
why are efficient appliances better for the environment?
they need less electricity to run which saves money and conserves finite resources and CO2 emissions
what is efficiency?
a percentage or decimal that tells us how much energy is useful
what does friction do to atoms?
gives them more energy
what do electrons use extra energy for?
to move from one insulator to the other
what happens when electrons are gained?
becomes negative
what happens when electrons are lost?
becomes positive
what happens to the electrons after rubbing a cloth on a balloon?
positive electrons rub off onto cloth
how are static charges produced?
when electrons are trapped and cannot move
