First person to answer science questions correctly will get 20 poins?
NOTE THIS IS NOT MY HOMEWORK. SCHOOL FINISHED TWO WEEKS AGO FOR ME. I JUST WANT TO SEE WHAT OTHER PEOPLE GET. I GOT A 7 OUT OF 9.
12. Many cooking pots have hard plastic or wooden handles. What is the reason for this?
a. The handles are made from a good conductor of heat so that the heat is drawn away from the pan to protect your hands.
b. The handles are made from a poor conductor of heat so that the heat cannot be drawn into your hands as easily.
c. The handles are made from different materials to make use of the differing chemical properties to block the transfer of heat.
d. When the handles heat up, they expand more than the pot thus allowing the handles to radiate heat away more effectively.
13. What does it mean to say that a material has a high specific heat?
a. It means the material is a poor conductor of heat.
b. It means the material is a good conductor of electricity.
c. It means the material can get very hot compared to other materials.
d. It means the material readily absorbs and releases energy.
14. How can the specific heat be characterized for a material that heats up quickly?
a. It has a low specific heat.
b. It has a high specific heat.
c. It is impossible to make this judgment.
15. What mass of ethyl alcohol will give up 33,000 J of energy as it cools from 27°C to -3°C?
a. 2.41x109kg
b. 0.566kg
c. 1.92×109kg
d. 0.453kg
Questions 16-19
A 75 g chunk of metal is heated to 100°C and then dropped into 0.5 kg of water initially at 22°C. After a short time, the water reaches a final temperature of 23.1°C.
16. How much heat energy does the metal transfer to the water?
a. 345 kJ
b. 345 J
c. 2302 J
d. 24.5 kJ
17. What is the final temperature of the chunk of metal?
a. 23.1°C
b. 22°C
c. 92.7°C
d. 54.9°C
18. What is the specific heat of the metal?
a. 399
b. 27,900
c. 130
d. 377
19. The chunk is most likely made of which type of metal?
a. brass
b. lead
c. tin
d. copper
20. In the old days, it was common to bring a hot object into bed with you on a cold winter night. Which would be better: a 10 kg hot water bottle or a 10 kg iron block, both at the same temperature?
a. The water bottle because water has a higher specific heat.
b. The water bottle because iron has a higher specific heat.
c. The iron block because water has a higher specific heat.
d. The iron block because iron has a higher specific heat.
2006-07-07 06:48:57 · 5 answers · asked by Max M 1 in Science & Mathematics ➔ Physics
b, d, a, b, c, a, c, b. a
2006-07-07 06:55:08 · answer #1 · answered by Mr. E 2 · 0⤊ 0⤋
ARE YOU SERIOUS??
THIS IS A TEST NOT JUST QUESTIONS.
YOU HAVE TO GET ALL THOSE "QUESTIONS" RIGHT AND YOU ONLY GET 10 PTS???
Some people might think you are a nut. Probably a genius but a nut nevertheless.
My question is: How long did it take you to type all this out?
a. 10 minutes
b. 45 minutes
c. 45 minutes + 30 minutes
d. all morning + some of the afternoon
"LOL"
good luck to everyone who actually does this. Oh, I know this person will get answers on this.................WHEW!
2006-07-07 07:05:12 · answer #2 · answered by geminisista 3 · 1⤊ 0⤋
12 b
13 a
14 a
15 Sp. heat of ethyl alcohol ?
16 c
17 a
18 a
19 Look it up
20 a
2006-07-07 07:05:16 · answer #3 · answered by ag_iitkgp 7 · 1⤊ 0⤋
Hey c'mon this is CHEATING!! why r u guys helping him telling answers..he shd work it out himself...c'mon boy grow up...
2006-07-07 07:08:33 · answer #4 · answered by Prashant Singh 2 · 0⤊ 0⤋
12 - a
13 - c
14 - b
15 - a
16 - a
17 - c
18 - b
19 - d
20- d
2006-07-07 06:55:46 · answer #5 · answered by aab 2 · 0⤊ 0⤋