Calculations
A 2kg ball is 2m off the ground, how much potential energy does it have?
39.2J
When the same type of energy is moved from one thing to the other it is called a.......
Transfer
A book is sitting on a high shelf. What type of energy does it have?
Gravitational potential energy
Explain the transformation that occurs to create solar power?
Light energy to electrical energy
What is a random error?
An error that is not applied to all trials. Usually due to human error?
A 1.5kg bird is 20m off the ground, how much potential energy does it have?
294J
When the type of energy changes it is called a .............
Transformation
A stretched rubber band is about to be released.
Elastic potential energy
Explain the transformation that occurs to create wind power?
Kinetic energy to electrical energy
What is a systematic error?
Something that is impacts every trial the same, usually when equipment is faulty eg. a thermometer.
A 1000kg car is traveling at 10m/s, how much kinetic energy does it have?
50000J
Name 4 types of energy:
Kinetic
Light
sound
heat
electrical
gravitational
chemical
elastic
A child slides down a playground slide.
Gravitational potential energy is decreasing and kinetic is increasing
Explain the transformation that occurs to create hydro power?
Kinetic energy to electrical energy
What does it mean if your results are precise?
That all the values are close together
1 L of water changed from 15 degrees, to 40degrees, how many Joules of energy did it gain?
105J
Explain why all types of energy could either be described as potential or kinetic energy?
Because heat, sound and light are all kinetics because they involve movement and gravitational, elastic, chemical are all potential energy
A light globe is switched on, what type of energy does it emit?
Light and heat
Explain the transformation that occurs to create nuclear power?
Chemical potential energy to electrical energy
What does it mean if your results are accurate?
That the results are close to the real value
A 10kg box is dropped from 5 m high, how fast will it be travelling as it hits the ground?
9.9m/s
energy can neither be created nor destroyed - only converted from one form of energy to another.
A matchstick is struck to light a fire.
Chemical energy stored in the matchstick is converted to thermal energy and light energy
Explain the transfers and transformations that occur to produce geothermal power?
Heat energy in the earths core is transferred to heat energy in water, heat rises and transforms to kinetic energy, which transfers to a turbine which then transforms the kinetic energy into electrical energy
If your results are not precise, what type of error is occuring? and explain
Random error