biophysics revision 3

BTU

the energy required to heat 1lb

Heat capacity

amount of heat necessary for a given temperature change

what is the mechanical equivelant ?

for every 1 cal = 4.186

countercurrent exchange

happens to not waste the energy

convection

carrier of heat

to make heat convection happen what should we do ?

change in density

why does see or land breezes happen ?

1) change of heat capacity
2)convection

heat that comes out of any body is

infrared

electromagnetic waves factors ?

can propagate through vaccum

conduction

heat exchange which is flow of heat directly

latent heat

q over m

why you add salt on ice box

to lower melting temp

when the work could be positive ?

if the force is with you

if the work is negative

the force is reverse

if force is up or down

work is zero

units of the power are:

1) watt
2) j\S
3)HP

kinetic energy

bec of body

potentional energy

bec of place