Physics: P3 - energy

name the energy stores

kinetic, chemical, nuclear, elastic potential, electric magnetic, gravitational potential, thermal, vibrational

what are the 5 ways energy can be transferred

forces, electric currents, heat, radiation and chemical reactions

which energy store does wasted energy usually go to

thermal energy

what is the calculation for kinetic energy

½ x mass x velocity squared

what is the formula for mass

2KE/velocity squared

what is the formula for velocity

2KE/mass - square rooted

what’s the formula for gravitational potential energy

mass x gravitational field strength x height

give 3 examples of insulators

an eraser, a paper envelope and chalk

give 3 examples of conductors

a metal pen, a pencil, and a paper clip

name 2 examples of chemical energy stores

food, fuel

what is the unit of energy

joules or J

what is the conservation of energy

energy can’t be created or destroyed only transferred

how do you calculate energy efficiency

useful energy/ total energy

how do you calculate useful energy

efficiency x total energy

how do you calculate total energy

efficiency x useful energy

give 4 examples of renewable energy sources

solar energy, wind, hydroelectric power, geothermal power

give 4 examples of non-renewable energy sources

nuclear, oil, coal and gas

give two advantages of fossil fuels

easy to transport and easy to store

give two disadvantages of fossil fuels

climate change and eventually will run out

what are fossil fuels

a fuel for things that will run out and aren’t environmentally friendly

which green house gas do fossil fuels realease

carbon dioxide

name the two types of waves

transverse and longitudinal

give and example of a transverse wave

light

give an example of a longitudinal wave

sound