Quiz #4 Flashcards
(26 cards)
If you measure the width of an outdoor barn with a steel tape on a very cold day, your measured width will be…
a bit long
If you release a single molecule in an evacuated region, it will initially…
fall just as a baseball would
When an iron ring is heated, the hole inside it becomes…
larger
Which of these units of temperature is larger?
both are the same size (Kelvin and Celcius)
a bridge is more likely to be ice covered than the roadway on a cold day because…
heat upwelling from the ground below is absent on a bridge
Both black and white road surfaces absorb sunlight. The warmer surface is…
black
A block of wood and a block of copper will feel neither hot nor cold to the touch when they each have…
your temperature
Compare to a giant iceberg a cup of hot coffee has…
higher temperature, but less internal energy
A canteen that is wet on the outside results in water inside that is…
cooler
A soda pop that contains only steam is placed top downward in a pan of water. Whap! The can is dramatically crushed by atmosphereic pressure. The reduced pressure inside the can is due to…
the condensation of steam
if glass expanded more than mercury in a mercury thermometer, then the column of mercury would fall when the temperature…
increases
In practice, a good insulator…
slows heat flow
Adiabatic processes occur in Earth’s
all of the above (atmosphere, oceans, and mantle)
An example of a heat engine is…
all the above
DEAN teaches that the reglation is due to…
open structured nature of ice crystal
The ideal efficiency for a heat engine operating between the temps 2700K and 300K is…
89%
The main purpose of the condenser in the steam cycle is to…
lower pressure on the back side of the turbine blades
open spaces in ice crystals contribute to…
decreased density
The addition of salt into water affects its…
freezing point
Evaporation is a cooling process and condensation is…
a warming process
Water in a car radiator sometimes boils explosively when the radiator cap is removed, which is due to sudden…
reduced pressure
When a solid changed to a liquid, the solid…
absorbs energy
When mechanical work is done on a system, an increase normally occurs in its…
both of these (internal energy and temperature)
Which of the following expands more when the temperature is increased? Equal volumes of…
helium (He2)
