4.1.1 energy changes in a system

what is a system?

an object or a group of objects

what is the equation for kinetic energy?

Ek = 1/2mv2

what is the equation for elastic potential?

Ee = 1/2ke2

what is the equation for gravitational potential?

Ep = mgh

what is specific heat capacity?

the energy required to raise the temperature of 1kg of a substance by 1°C or 1K

what is the equation for specific heat capacity?

energy = mass x specific heat capacity x temperature change

what are the units of specific heat capacity?

change in thermal energy - joules, mass in kg, specific heat capacity - J/kg°C, temperature change in degrees celsius

what is the definition of power?

the rate at which energy is transferred or the rate at which work is done

what is the equation for power?

power = energy transferred / time = work done / time

what is an energy transfer of 1 joule per second equal to?

a power of 1 watt