K.C.S.E Physics Q & A - MODEL 2001PP2QN01
A block of ice of mass 40g at 0C is placed in a calorimeter containing 400g of water at 20C .Ignoring the heat absorbed by the calorimeter, determine the final temperature of the mixture after all the ices has melted. (Specific latent heat capacity of fusion of ice= 340,00J/kg, specific heat capacity of water = 4,200j/kg).​
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K.C.S.E Physics Q & A - MODEL 2001PP1QN19
​Fig 12 shows tow identical containers A and B into which a copper rod is fitted. The containers are well lagged.
​The liquids in the containers were initially at the same temperature if the heat is a applied continuously at the position shown, state with reason for the container through which the loss of heat is likely to be higher.
answer
K.C.S.E Physics Q & A - MODEL 2000PP1QN22
​Two identical blocks of copper are taken from the same furnace. One block is dropped into a well - lagged calorimeter containing 200g of methylated spirit. Both water and spirit were initially at the same temperature. After being given time to stabilize the temperature, it was found that more spirit than water had evaporated.
State two factors that could have caused this difference.
ANSWER
K.C.S.E Physics Q & A - MODEL 1998PP2QN04
a) In an experiment to determine the rate at which solar energy is absorbed by a surface, an aluminum block, coated black and fitted with a heater (Fig. 3) is exposed to the sun, for a period of time. The temperature rise in noted. After the temperature of the block is allowed to fall to the initial temperature, the block is electrically heated to the temperature.
(i) Draw and labeled a circuit diagram that would be used to determine the electrical energy.
(ii) State the measurements that would be taken in (a)(i) to determine the rate of heating of the block. (iii) Explain how the measurements stated in (a) (ii) would be used to determine the rate of heating of the block by the sun. b) Fig 4 shows a photocell (i) Label the cathode and anode.
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M.A NyamotiMy passion is to see students pass using right methods and locally available resources. My emphasis is STEM courses
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