Energy Flashcards
Investigating specific heat capacity
1-record the mass of the copper block
2-wrap insulation around the block
3-put the heater into the hole in the block and the block onto a heatproof mat
4-connect the power pack and ammeter in series and the voltmeter across the power pack
5-using the pipette, put a drop of water into the small hole
6-put the thermometer into the small hole and measure temp
7-switch the power pack 12v and turn on
8-record voltmeter and ammeter readings during the experiment
9-turn on the stop clock and record temp every minute for ten minutes
10-record results in a table
11-calculate work done and plot a line graph of work done against temp
Rule between gpe and ke
when an object falls, it loses gpe and gains ke
name 8 energy stores
kinetic
thermal
chemical
elastic potential
gravitational potential
electrostatic
magnetic
nuclear
conservation of energy
energy cannot be created nor destroyed, just transferred from one form to another
conduction
when a solid is heated the particles vibrate and collide more frequently, energy is transferred
convection
when a liquid or gas is heated the particles move faster. The liquid or gas become less dense, the denser region will rise above the cooler region
insulation
reduces the amount of heat lost
efficiency
when energy is transferred some is wasted. less energy wasted the more efficient the transfer
two equations for efficiency
useful output energy/total input energy
useful power output/total power input
examples of renewable energy
solar
hydroelectric
geothermal
wind
wave power
biofuels
examples of nonrenewable energy
coal
oil
gas
advantages of renewable
no pollution
carbon neutral
cannot run out
disadvantages of renewable
often unreliable
cannot meet energy demands
advantages of nonrenewable
provide a lot of energy
disadvantages of nonrenewable
damages environment
will run out
