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
Question 2
2.
Which property represents the amount of heat required to raise the temperature of a substance?
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...
Question 4
4.
When an object is heated, it generally expands due to...
Question 5
5.
The expansion of a substance caused by heating is known as...
Question 6
6.
Reach chapter 15, what questions do you have?
Question 7
7.
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?
Question 8
8.
Why can you comfortably hold your fingers closely beside an open candle flame, but not comfortably closely above a candle flame?
Question 9
9.
What is the role of "loose" electrons in heat conductors?
Question 10
10.
As a given mass of air rises, why does it cool down?
Question 11
11.
Why does the direction of coastal winds change from day to night?
Question 12
12.
Why does the hot water warmed by the hot cup below the tank have to rise?
Question 13
13.
Since all objects are absorbing energy from their surroundings, why don't the temperatures of all objects continually increase?
Question 14
14.
How do the wavelengths of radiant energy vary with the temperature of the radiating source
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".
Question 16
16.
Two objects can have different amounts of heat, but be at thermal equilibrium
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?
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?
Question 19
19.
Categorize each of these as the major type of heat transfer it represents.
Walking barefoot on a hot sidewalk
sun burn
A lizard warming its belly on a hot rock.
microwaving food
solar panels
frying vegetables in a pan
Chimney draft
x-ray imaging
Ocean currents
an incandescent bulb
Ironing clothes
Blowing on a hot beverage
A hair dryer drying hair
Conduction
Convection
Radiation
Question 20
20.
Which of the following is a poor insulator?
Question 21
21.
Which mode of heat transfer involves the transfer of heat through direct contact?
Question 22
22.
Which mode of heat transfer occurs when heated particles rise and cooler particles sink?
Question 23
23.
Which mode of heat transfer does not require a medium?
Question 24
24.
What is the function of the silver surface of a thermos bottle?
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