Question

HELP ASAP!! DUE TOMORROW!! FAN AND MEDAL!!

1. People in the United States know that water boils at 212°F. In Europe,
people know that water boils at 100°C. Is the water in the U.S. different
than the water in Europe? What explains the two different temperatures?

2. A comfortable room temperature is 20°C. What is this temperature in
degrees Fahrenheit?

3. Which is colder, 0°C or 20°F?

4. Explain the scientific meaning of the word random.

Answer 1

5. Temperature measures:
a. The kinetic energy of the random motion of molecules in an object.
b. The kinetic energy of the average motion of molecules in an object.
c. The potential energy of an object.
d. The motion of an object.

6. A thermometer that uses a liquid to measure temperature works because:
a. The electrical resistance in the liquid changes with temperature.
b. The liquid changes color as temperature changes.
c. The expansion of the liquid is directly proportional to increase in
temperature.

7. Which statement best describes the relationship between temperature and
thermal energy?
a. Temperature is inversely related to thermal energy.
b. Temperature is directly proportional to thermal energy.
c. As temperature goes up, thermal energy goes down.
d. Thermal energy is not related to temperature.

8. Would thermal energy be greater at 0°C or 48°F? Explain your answer.

9. Why can’t there be a temperature lower than absolute zero?

Answer 2

5. is B

Answer 3

6. is a

Answer 4

7. is B

Answer 5

\[C=(F-32)*5/9\]

Answer 6

9. particles stop moving at 0 degrees kelvin.

Answer 7

1. Two different scales. I bet you know you would rather have a half kilogram of "something" than a half pound of the same "something." F and C are two different scales. Boiling temperature at sea level is the same in the US and Europe -- it is the same temperature, just expressed in two different scales.
2. There is a conversion formula, but you can get by if you know a few points. -40 C = -40 F, 0 C = 32 F, 40C = 104 F (you may know this if you live in the southwestern US), 100 C = 212F. Now 40C = 104 F, 104 F is 72 F more than freezing. 20 C is halfway between freezing (0C) and 40 C.. 1/2 of 72 F is 36 F.
so 32 F (=0 C) + 36 F (halfway to 40C) = 68 F = 20 C = a comfortable room temperature for most people.
3. 20 F, since 0C = 32F.
5. a. If it were be, and the average motion of the molecules had a value > 0, the object would be moving. But even items standing still have a temperature, so a.
6. c some liquids expand in proportion to temperature, and these are candidates for use in thermometers. People are not allowed to have mercury thermometers anymore, but you may see outdoor/indoor thermometers which use alcohol with a red dye.
7. b -- get this by process of elimination, since the others are nonsense.
8. 48 F is a higher temperature than 0 C (=32 F) so it represents greater thermal energy.
9. At 0 K (absolute zero) thermal energy is zero and random motion stops. You cannot go slower than fully stopped.