PHYS-1405 ch.6-9
a good heat conductor is
a poor insulator
a block of wood and a block of copper will feel meither hot nore cold to the touch when they each have
your temperature
a photovoltaic cell receives energy input by
radiation
the surface of earth loses energy to outer space due mostly to
radiation
if a red hot thumbtack is immersed in warm water, the direction of heat flow will be from the
red hot thumbtack to the warm water
you heat a half-cup of tea and its temperature rises by 4C. How much will the temerature rise if you add the same amount of heat to a full cup of tea
2 degrees C
which of these would represent a greater change in temperature?
A Celsius degree A Kelvin ** both are the same size
heat energy is measured in units of
Calories and joules **both of these
the quantity of heat that a substance can transfer relates to its
Change in its temperature mass specific heat capacity *** all of the above
the process of boiling
Cools the water of being boiled depends on atmospheric pressure is a charge of phase below the water surface **ALL OF THE ABOVE
when Philadelphia's temperature is 40F and Miami's temperature is 80F
Miami is warmer than Philadelphia
Which body glows with electromagnetic waves?
Sun and Earth
which has the higher specific heat capacity, water or land?
Water
if you measure the width of an outdoor barn with a steel tape on a very cold day, your measured witdth will be
a bit longer
if you measure the distance between two telephone poles with a steel tape on a very hot day, your measured distance will be
a bit short
pour a liter of water at 40C into a liter of water at 20C and the final temperature of the two becomes
at or about 30C
a red-hot piece of coal will cool quicker in a
cold room
a soda-pop can containing only steam is placed top downward in a pan of water. Whap! The can id dramatically crushed by atmopheric pressure. The reduced pressure inside the can is due to
condensation of steam inside
soaring birds and glider pilots can remain aloft for hours without expanding power, due to
convection
if a volume of air is warmed, it expands and tends to
cool
aluminum has a specific heat capacity more than twice that of copper. Place equal masses of aluminum and copper wire in a flame and the one to undergo the fastest increase in temperature will be
copper
one of water's interesting thermal properties is that when it takes a relatively
long time in changing tmperature
open spaces in ice crystals contribute to
decreased density
as a piece of metal with a hole in it cools, the diameter of the hole
decreases
systems alone tend to move toward
disorder
the first law of thermodynamics is a restatement of the conservtion of
energy
when you touch a hot potato with your finger, energy flows
from the potato to your finger
when you touch a cold piece of ice with your finger, energy flows
from your finger to the ice
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
a substance that heats up relatively slowly has a
high specific heat capacity
an apple pie will be a net emitter of energy when its temperature is
higher than its surroundings
as a system becomes more disordered, entropy
increase
If a pizza absorbs more energy than it emits, its temperature
increases
the same quantity of heat is added to different amounts of water in two equal-size containers. The temperature of the smaller amount of water
increases more
your locker gets messier each week. in this case, the entropy of your locker is
increasing
a temperature difference of 10 celsius degrees is also equal to a temperature difference of 10 on the
kelvin scale
to say that body A has a higher temperature than body B is to say that body A has more
kinetic energy per particle -is defined as temperature
place a 1-kilogram block of iron at a 40C into 1 kilogram of water at 20C and the final temperature of the two becomes
less than 30C
the fact that desert sand is very hot in the day and very cold at night is evidence that the specific heat capacity of sand is relatively
low
the reason you can walk barefoot on red-hot coals of wood without burning your feet mainly involves
low conductivity of the coals
a substance that heats up relatively quickly has a
low specific heat capacity
a blueberry pie will be a net absorber of energy when its temperature is
lower than its surroundings
if you hold one end of a metal bar against a piece of ice, the end in your hand will soon become cold. Does could flow from the ice to your hand?
no- heat flows from your hand to the ice
The planet Earth loses heat primarily by
radiation
when stringing telephone lines between poles in the summer, it is advisable to allow the lines to
sag -telephone lines are longer in the warm and short in the cold
Two identical blocks of iron are placed in contact, one at 10°C and the other at 20°C. If the cooler block cools to 5°C and the warmer block warms to 25°C, this would violate the
second law of thermodynamics
the higher the temperature of an object, the
shorter the wavelengths it radiates
it is commonly though that a can of beverage will cool faster in the coldest part of a refrigerator. Knowledge of Newton's law of cooling
supports this knowledge
when you touch a nail stuck in ice, energy flows from
your hand to the ice