3. 3. An electric heater of power 2kW is used to heat 0.8kg of water in a container of heat capacity 300J/K. If the water is initially at 18oC, how long will it take to heat it to the boiling point of 100oC? What mass of water will have boiled away in 4 minutes? [S. H.C of water = 4200J/kg/K, LV = 2.3X106J/kg]​

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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a straight line sloped

if they have a finite resultant