Physics, 18.02.2022 17:50, aderahd7352
1a. The heating coil of an aluminium electric kettle is labelled 240V, 4KW of mass 3kg at temperature of 25 degree centigrade is poured into the kettle. The kettle is connected to a 240V supply when its temperature is 25 degree centigrade, calculate the time taken for the water to reach its boiling point
b. In what further time will 10 per cent of water in the kettle evaporate away? (Mass of kettle =0.5kg, specific heat capacity of aluminium =900J/kgK.
Specific latent heat of evaporation of water=2.268×106 J/kgk
Answers: 1
Physics, 22.06.2019 06:30, corcoranrobert1959
At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid
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Physics, 22.06.2019 08:00, nikkiwoodward1ovgszp
What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?
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1a. The heating coil of an aluminium electric kettle is labelled 240V, 4KW of mass 3kg at temperatur...