Physics

stions: 1. Why is it not safe to turn on the kettle without the element in the kettle being fully submerged? 2. Why do you use a measuring jug rather than the markings on the side of the kettle to measure the volume of water? 3. Why do you boil your kettle and then empty it before you start to record results? 4. Use equations to show that the gradient of a time (on y axis) versus volume of water (on x axis) graph is given by: This should be an algebraic proof, you should not use numbers, just the letters to represent the quantities. HINT: gradient is given by rise/run where rise is the quantity on the y axis and run is the quantity for the x axis. You will then need to make use of: where Q is heat, the amount of energy added to the water. 5. How accurate is your measured value for cw? 6. What could you do to get a more accurate result?

The aim of this experiment “calculation of the specific heat of water” using a electric kettle and comparison with the actual value of the specific heat of the water.

Risk controls
The experiment is done by keeping all the risk controls in mind and taken care of that. All the precautions are used in order to prevent any hazard to myself and the other people. I assure that the experiment is done with all possible precautions and safety factors by keeping the risk controls in mind.
1.    It is not safe to turn on the kettle without the element being fully submerged because if the kettle is on before fully submerged as the temperature of the water will increase and at high temperatures if we try to submerged the element then there is possible hazard of burning and get a electric shock.

2.    A measuring jug is used instead of marking on the sides of the kettle because as the temperature increases of the water bubbles forms on the surface