Question 13.5 pts
The air pressure in a container of air at 30°C will double when heated to ______.
Group of answer choices
600 degrees C
310 degrees C
54 degrees C
333 degrees C
none of the above
Question 23.5 pts
In a lake, ice tends to form first at the _______.
Group of answer choices
bottom of the lake
surface of the lake
either depending on water depth
Question 33.5 pts
A heat engine would have 100% efficiency if its low-temperature reservoir were _______.
Group of answer choices
as hot as its reservoir
at absolute zero
either of these
neither of these
Question 43.5 pts
In one word, how can water in the power plant of a nuclear submarine far exceed 100°C?
Group of answer choices
conductivity
vaporization
evaporation
condensation
pressure
Question 53.5 pts
An equal volume of air at 0 degrees but twice as hot has a temperature of ______.
Group of answer choices
100°C
64°C
0°C
273°C
none of the above
Question 63.5 pts
Ice is less dense than water because ________.
Group of answer choices
it is composed of open-structured crystals
molecules are more compact in the solid state
density decreases with decreasing temperature
molecules vibrate at lower rates than water molecules
Question 73.5 pts
When I touch a cube of ice with my finger, energy flows ______.
Group of answer choices
from the ice to my finger
from my finger to the ice
actually, both ways
Question 83.5 pts
The greater the temperature difference between input and output reservoirs of a heat engine, the _______.
Group of answer choices
greater the efficiency
smaller the efficiency
both of the above
none of the above
Question 93.5 pts
A good conductor is ________.
Group of answer choices
a good insulator
a poor insulator
neither of these
Question 103.5 pts
In the formation of a cloud, moist air rises and ______.
Group of answer choices
cools
condenses
expands
all of the above
none of the above
Question 113.5 pts
A pumpkin pie can become an emitter of energy when its temperature is _______.
Group of answer choices
lower than its surroundings
higher than its surroundings
none of these
Question 123.5 pts
If the air of an inflated balloon quickly escapes, its temperature _______.
Group of answer choices
rises
remains unchanged
drops
none of the above
Question 133.5 pts
When Philadelphia's temperature is 30°F and Miami's temperature is 60°F, ________.
Group of answer choices
Miami is warmer than Philadelphia
Miami is twice as hot as Philadelphia
both of these
neither of these
Question 143.5 pts
Every heat engine ________.
Group of answer choices
expels heat to a lower-temperature reservoir
converts energy into mechanical work
gains heat from a high-temperature reservoir
all of the above
none of the above
Question 153.5 pts
When condensation occurs inside your bedroom window, the air outside is appreciably ______.
Group of answer choices
colder
warmer
both of these
neither of these
Question 163.5 pts
Terrestrial radiation is ______.
Group of answer choices
emitted by the Sun
emitted by Earth
both of these
neither of these
Question 173.5 pts
In winter, when a lake freezes, the air in the surrounding is ______.
Group of answer choices
cooled
warmed
both of these
neither of these
Question 183.5 pts
Newton's law of cooling deals with _______.
Group of answer choices
objects undergoing warming
objects undergoing cooling
both of these
neither of these
Question 193.5 pts
The lowest temperature that can be reached is ________.
Group of answer choices
-273 degrees C
0 degrees C
4 K
none of the above
Question 203.5 pts
Entropy is a consequence of the ______.
Group of answer choices
second law of thermodynamics
first law of thermodynamics
both of these
neither of these
Please show your full solution steps. First state what is given, then start with the symbolic equation, then show data entered into the equation, and then the final answer with proper units. Please write your steps vertically. You will not gain credit for showing only the answer.
Question 2110 pts
How much heat is required to raise the temperature from 20°C to 30°C of 300 grams of water if the specific heat capacity for water is 1 cal/g C?
Question 2210 pts
What is the ideal efficiency of a heat engine in which the fuel is heated to 5000 K and the surrounding air is 500 K?
Question 2310 pts
A gas is enclosed in a cylindrical container that is fitted with a piston. Heat of 42 J is added to the gas and as a result the piston does an external work of 32 J outwards, expanding the gas to a new volume. What is the change in the internal energy of the gas?
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