energy and power Flashcards
what is energy ?
it is a quantity that is coserved ,it can not be created or destroyed but it can be stored and transferred.
what is knenetic ennergy store ?
the amount of energy in a knenetic store depends on the objects speed
what is gravitational potential energy store?
this depends on the height of the object
what is thermal energy store?
depends on the temperature of the object
what is chemical energy store ?
occures due to chemical reactioin
what is elastic potential enrgy store ?
depends on the amount of compression or extension
what is conservation of energy ?
it means that energy does not appear or dissapear .
what is mechanical work ?
a force applied to move an object
what is electrical work ?
charges flow in a circuit
what is heating ?
when energy moves from thermal store of a hotter object to a thermal store of a cooler object
what is radiation ?
energy is transffered as a wave
the furmula for gravitational potential energy ?
Energy in the gravitational potential energy store (Ep) = mass (m) x gravitational field strength (g) x height (h)
the formula for kinetic energy store ?
Energy in the kinetic energy store (Ek) = 0.5 x mass (m) x velocity² (v²)
The hotter an object, the more energy it has in its thermal energy store .True or False
True
