Recent content by Dyl

Also, if 1800mL did correspond to an efficiency of 99.43%, what would happen if the kettle was to boil 2,000mL? The efficiency would then be 102% which cannot be possible. How can I explain this? I cannot create energy. :O

Gneill, yes we did measure the volume afterwards, and there was an increase; this was due to thermal volume expansion and my teacher said to not include it in our assignment as the measurement. Instead, just because I do believe it is slightly relevant, and it would demonstrate my...

Thanks guys for replying! I just realized, stupidly, that water inside the kettle will have more than one surface to escape from, and not just through latent heat loss through turning into water vapour; the water will actually be lost through convection with the sides of the kettle and...

Homework Statement Hey physicists. I have a problem. My assignment this term for physics is to test the efficiency of an electrical appliance, and to make suggestions on how to improve the efficiency for the future. I conducted a number of experiments on the kettle, using 2 different kettles...