Problem P. 3844. (December 2005)
P. 3844. An electric kettle, rated at 6 W, is turned on for 25 minutes and 1.2 l water which was initially at a temperature of 20 oC is heated. Find the final temperature of the water if the efficiency of the process is 0.7.
(3 pont)
Deadline expired on January 11, 2006.
Statistics:
291 students sent a solution. 3 points: 227 students. 2 points: 36 students. 1 point: 9 students. 0 point: 17 students. Unfair, not evaluated: 2 solutionss.
Problems in Physics of KöMaL, December 2005