physics
the total energy of motion of the molecule la in an object
thermal energy
the study of the flow of Heat energies
thermodynamics
a capillary tube with liquid thats calibrated to measure temperature.
thermometer
which of the following is the best conductor of heat a. wood b. water c. aluminum d. plastic
water (B)
this states that heat will always flow from hot objects to cold ones, efficiency is always less that 100% and total disorder can never decrease
2nd law
this states that it is impossible to achieve a temperature of absolute zero
3rd law
the lowest possible temperature in Kelvin scale where all molecules would stop
absolute zero
when mechanical work is done on a system there can be an increase in its a. internal energy b. temperature c. both d. neither
both (C)
the energy transferred between objects in contact as a result of temperature difference
conduction
heat that is transferred by movement of fluid
convection
the amount of disorder in a system
entropy
If 25g of hot water are added to 35g of cold water the heat lost by the hot water is ______ the heat gained by cold water a. greater than b. less than c. equal to
equal to (C)
thermal energy in motion
heat
two objects in thermal equilibrium have the same a. energy b. temperature c. heat d. force
heat (C)
a device that uses heat to do work and but is not 100% efficient and expels excess heat
heat energy
in general the entropy of a system tends to a. increase b. decrease c. remain the same d. A and C
increase (A)
the total amount of energy contained in an object
internal energy
the state that when two objects are in contact heat flows until they are in thermal equilibrium
0th law
this states that energy is never created or destroyed heat lost by an object is gained by another
1st law
a unit of measurement that was once called centigrade because there are 100 degrees between freezing and boiling points of water in this scale
Celsius
a unit of temperature in which freezing is 32 degrees
Fahrenheit
if the average kinetic energy of the particles that make up a liquid increases a. liquid changes state b. temp increases c. liquid lose heat surroundings d. all of the above
Temperature will increase (B)
which of the following has the most thermal energy a. ocean b. camp fire c. hot oven d. hot water bottle
ocean (A)
a transfer of heat energy through space by means of electromagnetic waves
radiation
a device that uses work to move heat from a cold place to a hotter one
refrigeration
what causes heat to flow a. temperature b. Thermal energy c. temp difference d. coldness
temp difference (C)
a measure of the average molecules kinetic energy
temperature