X1011599465-00070-17929</DOCNO> lec06 Energy: ability to do work (push, pull, lift, expand, ...) potential energy -- potential to do work kinetic energy -- energy of motion p.e. + k.e. = total energy conservation of energy -- energy lost during one process is gained in another internal energy -- energy stored in molecules Heat: energy being transferred because of temperature differences heat capacity -- amount of heat energy absorbed to cause selected temperature rise specific heat -- heat capacity for one unit of mass (1 kg is popular) latent heat -- heat energy to change the phase of water (gas, liquid, solid) sensible heat -- energy that we can feel and measure with a thermometer Heat transfer: conduction -- molecule to molecule (contact) convection -- mass movement (vertical) advection -- mass movement (horizontal) latent heat -- can be recovered radiation -- energy transfer without mass Radiation (or radiant energy) travels in the form of waves at the speed of light is large for small wavelengths (E = hc / lambda) is proportional to temperature^4 or T^4 (Staefan-Boltzmann Law) emits according to the black body curve black body curve maximum found using lambda = constant / T (Wein's Law)
(energy; lost; T:during one process) (the black body curve black body curve maximum; found; using lambda = constant / T) Context(the black body curve black body curve maximum found,List([1118, 1169))):(the black body curve black body curve maximum; found using; lambda = constant / T) (energy; stored; L:in molecules) (gas, liquid, solid) sensible heat -- energy that we can feel and measure with a thermometer Heat transfer: conduction -- molecule to molecule (contact) convection -- mass movement (vertical) advection -- mass movement (horizontal) latent heat -- can be recovered radiation; travels; ) (we; measure; with a thermometer Heat transfer) (energy; being transferred; because of temperature differences heat capacity) Context(energy being transferred,List([330, 354))):(push, pull, lift, expand, ...) potential energy -- potential to do work kinetic energy; is gained; in another internal energy) (energy; can feel; we)
the black body curve black body curve maximum found,List([1118, 1169)) energy being transferred,List([330, 354))
energy the black body curve black body curve maximum the black body curve black body curve maximum energy gas, liquid, solid) sensible heat -- energy that we can feel and measure with a thermometer Heat transfer: conduction -- molecule to molecule (contact) convection -- mass movement (vertical) advection -- mass movement (horizontal) latent heat -- can be recovered radiation we energy push, pull, lift, expand, ...) potential energy -- potential to do work kinetic energy energy
lost found found using stored travels measure being transferred is gained can feel
T:during one process
using lambda = constant / T
lambda = constant / T
L:in molecules
with a thermometer Heat transfer
because of temperature differences heat capacity
in another internal energy
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