Review: Suppose we have a 200-gram block of aluminum initially at 25°C. If we supply 5000 joules of heat energy to the block, what will be its final temperature? The specific heat capacity of aluminum is 0.9 J/g∘C. use
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Question 2
2.
Which property represents the amount of heat required to raise the temperature of a substance?
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Question 3
3.
If two substances have the same mass and are heated with the same amount of heat, the substance with the lower specific heat will...
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Question 4
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When an object is heated, it generally expands due to...
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Question 5
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The expansion of a substance caused by heating is known as...
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Question 6
6.
Reach chapter 15, what questions do you have?
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Question 7
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A piece of plastic and a piece of metal are both outside on a freezing (0℃) day. They are the same temperature. Why will they feel like they are different temperatures when you touch them?
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Question 8
8.
Why can you comfortably hold your fingers closely beside an open candle flame, but not comfortably closely above a candle flame?
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Question 9
9.
What is the role of "loose" electrons in heat conductors?
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Question 10
10.
As a given mass of air rises, why does it cool down?
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Question 11
11.
Why does the direction of coastal winds change from day to night?
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Question 12
12.
Why does the hot water warmed by the hot cup below the tank have to rise?
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Question 13
13.
Since all objects are absorbing energy from their surroundings, why don't the temperatures of all objects continually increase?
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Question 14
14.
How do the wavelengths of radiant energy vary with the temperature of the radiating source
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Question 15
15.
If I pour a hot cup of water into a bucket of cold water, they will eventually reach "thermal equilibrium". Define "thermal equilibrium".
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Question 16
16.
Two objects can have different amounts of heat, but be at thermal equilibrium
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Question 17
17.
Even if the air isn't quite freezing, frost can form on a plant at night, but will not form on a rock nearby. Why?
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Question 18
18.
Which will undergo a greater rate of cooling, a red hot poker in a warm oven, or a red-hot poker in a cold room?
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Question 19
19.
Categorize each of these as the major type of heat transfer it represents.
A hair dryer drying hair
an incandescent bulb
x-ray imaging
frying vegetables in a pan
Ocean currents
Chimney draft
A lizard warming its belly on a hot rock.
sun burn
solar panels
Walking barefoot on a hot sidewalk
microwaving food
Ironing clothes
Blowing on a hot beverage
Conduction
Convection
Radiation
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Question 20
20.
Which of the following is a poor insulator?
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Question 21
21.
Which mode of heat transfer involves the transfer of heat through direct contact?
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Question 22
22.
Which mode of heat transfer occurs when heated particles rise and cooler particles sink?
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Question 23
23.
Which mode of heat transfer does not require a medium?
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Question 24
24.
What is the function of the silver surface of a thermos bottle?
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Question 25
25.
Categorize the concepts here based on your understanding.
thermal conductivity
how heat is transferred through a solid
how heat is transferred through fluids
what is heat transfer via radiation?
relationship between the difference in temperature and the rate of heat transfer