Physics Flashcards
Name some forms of energy stores and transfers
Transfers: Radiation, Heating, Mechanically, Electrically,
Stores: Thermal Energy, Elastic Potential, Magnetic Energy, Chemical Energy, Electrostatic Energy, Kinetic Energy, Gravitational Potential Energy, Nuclear Energy
Explain how energy transfers through radiation (idk if that’s even a sentence)
Transfer occurs via waves such as sound or light waves
Explain how energy transfers through heating
Transfer occurs when thermal energy moves from a hotter object to a colder one
Explain how energy transfers mechanically
Transfer occurs between stores when a force acts on the object
Explain how energy transfers electrically
Transfer occurs when charges move through an electrical potential difference like in a closed wire circuit
Explain thermal energy
All objects have a store of thermal energy if it is hotter than -273°C (absolute 0)
Explain elastic potential
All objects that are stretched under tension have a store of elastic potential
Magnetic energy
Any object that will interact with each other in a magnetic field
Chemical energy
Objects that will release energy through a chemical reaction
Ex
Food batteries fuel being burned
How do you remember the different types of variables?
Independent variable’s the one you change
Independent variable’s the one you change
Dependant’s what you measure
And control will stay the same
Independent variable’s the one you change
What is the independent variable
It’s the one you change
What is the dependent variable
It’s the one you measure
What does the control variable do
It stays the same
Name and describe some types of renewable energy and the advantages and disadvantages that go with them
Biomass energy: it is the burning of live or dead things ex: fossil fuels + it doesn’t add greenhouse gasses - large areas of land are needed to grow enough trees
Geothermal energy: use it the already hot water from under the surface as fuel, once it has gained all the energy from this it délices the now cold water back under to be heated so that the cycle can continue + it’s renewable - very few places in the world can do this
Tidal energy: it’s like a windmill just underwater + it’s cheap to run once it is built - it costs a lot of money to actually build
Wind energy: a windmill + it;s cheap so poorer country’s can afford them - it will only work when it is windy
Solar energy: solar panels such as Elon Musk’s tesla solar roof tiles that look like any other roof tiles but last longer + nothing gets burned so no CO2 - it only works whilst it is sunny
Wave energy: one of it’s forms looks like floating cylinders in the ocean + it’s renewable - it can be diameter by storms
Hydraulic energy: a reservoir that you can open a bit of it to let some water out to generate power + we store the water higher so that when we need energy we can let some out - it changes the normal environment
Explain geothermal energy
It’s when you heat up water by putting it underground and then using the heat as energy
