Physics Flashcards
What is the equation for gravitational potential energy?
E = mgh
What is the equation for kinetic energy?
E = ½mv²
In the equation for gravitational potential energy, E=mgh, what does g stand for?
Gravitational field strength
What are the units of gravitational field strength g?
N / kg
What kind of energy is stored in a battery?
Chemical energy
What kind of energy is being stored when something gets hot?
Internal energy (also called thermal energy)
What is the equation that links power and energy?
P = E / t
What are the units of power?
Watts, W
What are the units of speed?
Metres per second, m/s
What is the equation that links voltage, current and resistance in a circuit?
V = I x R
What is the equation that links current, charge and time?
I = Q / t
where Q is charge
What is the equation that links voltage, charge, and energy?
V = E / Q
What is the unit of charge?
Coulombs, C
What is the unit of resistance?
Ohms, Ω
How many metres are in a kilometre (km)?
1000 metres
How many grams are in a milligram (mg)?
0.001 grams (1/1000)
How many watts are in a megawatt? (MW)
One million watts
What are the three kinds of radioactive radiation?
Alpha, beta, and gamma radiation
Which kind of radiation (radioactivity) is caused when a nucleus emits an electron?
Beta radiation
What do we call the energy needed to increase the temperature of a material?
The heat capacity
What do we call the energy needed to change the state of a material, for example from solid to liquid?
The latent heat
What is the equation for density?
density = mass / volume
