reducing unwanted energy transfers Flashcards
what does lubrication reduce
frictional forces
what happens when something moves
there is atleast on frictional force acting against it
what happens wehn frictional force acts against a moving object
energy is dissipated (i.e air resistance)
what is the transfer of energy on a falling object
kinetic to thermal
what do lubricants do
reduce the friction between objects being rubbed together
what happens when an object is heated
energy is transferred to the kinetic energy store of its particles
what happens to particles when an object is heated
vibrate and collide with eachother
what is thermal conductivity
the measure of how quickly energy is transferred through a material this way
what do materials with higher conductivity do
transfer energy between their particles at a faster rate
what happens when liquids and gasses flow
warmer and less dense region will rise rise above denser and cooler regions
wha is convection
particles move from hotter to cooler regions
