A. free electrons
B. atoms colliding frequency
C. low density
D. porous body
E. all of the above
A. their atoms collide frequently
B. their atoms-are relatively far apart
C. they contain free electrons
D. they have high density
E. all of the above
A. thermometer
B. radiatiouv pyrometer
C. thermistor
D. thermocouple
E. thermopile
A. increases
B. decreases
C. remains constant
D. may increase or decrease depending on temperature
E. none of the above
A. I.C. engine
B. air preheaters
C. heating of building in winter
D. all of the above
E. none of the above
A. blast furnace
B. heating of building
C. cooling of parts in furnace
D. heat received by a person from fireplace
E. all of the above
Pick up the wrong case?
A. face area
B. time
C. thickness
D. temperature difference
E. thermal conductivity
A. conduction
B. convection
C. radiation
D. conduction and convection
E. convection and radiation
A. J/m2 sec
B. J/m °K sec
C. W/m °K
D. A. and C. above
E. B. and C. above
A. conduction
B. convection
C. radiation
D. scattering
E. convection and radiation