Energy

Created by

Ciara

Cards (20)

State the law of conservation energy?
Energy cannot be created or destroyed only changed form
What are the nine ways in which energy can be stored?
Kinetic, thermal, light, chemical, gravitational potential, elastic potential, electrical, sound, nuclear
What is another name for energy transferred?
Work Done
What is gravitational potential energy?
The energy an object has when raised in a gravitational field
What is kinetic energy?
The energy of a moving object
What is elastic potential energy?
The energy stored in stretching material
What is power?
Rate of energy transfer (how much energy transferred every second)
What is useful energy?
Energy transferred in the way, which is wanted
What is wasted energy?
Energy that is not transformed to useful form
what is efficiency?
Efficiency is a measure of how much of your input energy end up in the useful form
How do you make something more efficient?
More energy/power going to your desired function. This can usually be by adding more insulation to moving parts.
Describe what a more powerful person/device actually means?
The more powerful and appliance is, the faster the rate at which it transfers energy
What is specific heat capacity?
The specific heat capacity of a substance is the energy needed to raise the temperature of 1 kg to the substance by 1°C
What is the basic principle behind all thermal insulation?
Trapping air to reduce energy transfers
What is the latent heat of fusion?
The specific Layton heat of fusion is the energy needed for 1 kg of substance to turn from a solid to liquid or liquid to solid
What is a renewable energy source?
A resource which replenishes quicker than it is used, or a resource which cannot run out e.g. wind
What is a nonrenewable energy source?
A resource which is used faster than it is replenished
What is a green resource?
A resource which does not produce any greenhouse gases, e.g. biofuel can be renewable if more trees are planted than cut but still produced greenhouse gases when burned
What are the eight ways to generate energy?
Wind, tidal, solar, geothermal, nuclear, fossil fuels, biofuel/biomass and hydroelectric
What is a system?
A system is an object or group of objects