first paper Flashcards
(22 cards)
What are the most fundamental ideas in physics called?
conservation laws
What do conservation laws tell us?
That some quantity does not change
4 forms of energy
1) mechanical
2) electromagnetic
3) chemical
4) nuclear
define energy
the ability to do work
4 forms of potential energy
1) gravitational
2) chemical
3) elastic
4) electromagnetic
4 forms of kinetic energy
1) moving objects
2) heat
3) sound waves
4) other waves
where do living organisms obtain energy ( 3 places) ?
1) sunlight
2) absorbed by plants
3) photosynthesis
Define work
the product of force and the distance through which the force moves an object in the direction of the force.
Define energy
the measure of a systems ability to do work.
define kinetic energy
energy associated with an objects motion
define potential energy
energy associated with the position of an object within some system
define gravitational potential energy
energy associated with the relative position of an object in space near the earths surface
how do objects interact with the earth?
gravitational force
is it possible to create energy from mass?
yes
is it possible to use energy to create mass?
yes
energy can be transformed from…
one form to another
what is the conservation of energy law?
energy cannot be created or destroyed
the total energy of an isolated system is…
constant
5 ways to transfer energy
1) by work
2) heat
3) mechanical waves
4) electrical transmission
5) electromagnetic radiation
define power
the rate of energy transfer
we can define units of work or energy in terms of…
units of power
three laws of thermodynamics
1) In an isolated system the total amount of energy is conserved
2) the many different kinds of energy are interchangeable
3) the kind of energy can change but the total amount cannot.
