Physics救急(2)(要在6.00p.m.前收到Ans)

6. Aheater can raise the temperature of 2kg water by 10℃ in 10 minutes. The approximate time required to raise 1 kg water by water by 20℃ using two such heaters is

A. 2 minutes.
B. 5 minutes.
C. 10 minutes.
D. 15 minutes.


8. If same amount of heat energy is supplied to each of the following
substances,which one has the greatest specific heat capacity?

Mass/kg Rise in temperature/℃
A. 1 9
B. 2 8
C. 3 7
D. 4 6



9. Two cups of liquids A and B of the same kind are mixed together. The
mass of liquid A to that of liquid B is 1:2. Which of the following about the process is/are correct?
(1) The ratio of the temperature change of liquid A to that of liquid b is 2:1.
(2) The ratio of the heat change of liquid A to that of liquid B is 1:1.
(3) The ratio of the final temperature of liquid A to that of liquid B is 2:1.

A. (1) and (2) only
B. (2) and (3) only
C. (1) and (3) only
D (1),(2) and (3)