Could someone please check my physics homework?
! Due in a few days!
1. What would be wrong if water had a lower specific heat?
*a. The temperature would decrease more rapidly when water gives up energy.
b. Ponds would be less likely to freeze.
c. Water would readily be cooled to the freezing point.
2. Which statement is wrong?
*a. When the same amount of heat produces different changes in temperature in two sub-stances of the same mass, we say that they have different specific heat capacities.
b. Different substances have different thermal properties due to differences in the way energy is stored internally in the substances.
c. Adding the same amount of heat to two different objects will produce the same in-crease in temperature.
d. Each substance has its own characteristic specific heat capacity.
e. Temperature measures the average kinetic energy of random motion, but not other kinds of energy.
3. If the air in your room is in thermal equilibrium, which of following is wrong?
a. The molecules of the air have the same average kinetic energy.
b. Different parts of your room have the same average temperature.
c. The molecules of the air have the same average speed.
*d. The molecules of the air exchange energy with each other at all times.
4. Iceland, so named to discourage conquest by expanding empires, is not at all ice-covered like Greenland and parts of Siberia, even though it is close to the Arctic Circle. The average winter temperature of Iceland is considerably higher than in the regions at the same latitude in eastern Greenland and central Siberia. What explains this?
a. Neither is true.
b. Iceland is below sea level.
*c. The climate of Iceland is moderated by the surrounding water.
d. Both are true.
5. What do you say about the temperature of water at the bottom of Niagara Falls?
a. the same as the temperature at the top
b. much lower than the temperature at the top
c. a little lower than the temperature at the top
d. It’s impossible to predict without a measurement.
*e. a little higher than the temperature at the top
f. much higher than the temperature at the top
6. In your room there are things such as tables, chairs, other people, and so forth. Which of these has a temperature greater than the temperature of the air?
a. tables, chairs and other people
*b. people
c. tables
d. chairs
e. All are wrong
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