Physics, 12.04.2021 14:00 santos200154

Please help Heat Track 2 –WorksheetPart 1:
Working with the equations.
Q = m c & P = E/t
1.How much heat is needed to raise the temperature from 25 oC to 50 oC of 5kg of substance? The specific heat capacity of the substance is 300J/kgoC.
2.How much heat is given off when an iron ball of mass 2kg and specific heat capacity 440J/kgoC cools from 300oC to 200oC.
3.A piece of aluminium of mass 2.5kg is heated from 20oC to 100oC. If the energy needed to raise the temperature of the aluminium is 180,000J, what is the specific heat capacity of the aluminium piece?
4.A 2kg block of iron is given 10kJ of energyand its temperature rises by 10oC. What is the specificheat capacity of iron?
5.A150g potato cools from 1000C to 50oC. If the specific heat capacity of potato is 2000J/kgoC, how much heat does the potato loose?
6.Sarah heats 0.5kg of water in a small electric kettle to make some tea. The temperature of the water rises for 20oC to 80oC. a.What is the rise in temperature?
b. Given that the specific heat capacity of water is 4200J/kgoC, find the heat energy needed.7.In an experiment to find the specific heat capacity, a student heated 500g of water from 22oC to 32oC
.a. What is the mass of water in kg?
b. What is the temperature rise?c. If the specific heat capacity of water is 4200J/kgoC, calculate the heat energyused?d. The student used a stop watch to record the time during which an immersion heater of 500W was switched on. For how long was the heater switched on?
8.A3.0kW electric kettle is capable of heating 2kg of water from 20oC to 100oC in 300 seconds. a.How much electrical energy is supplied?b. Water has a specific heat capacity of 4200J/kgoC, calculate the heat energy needed to heat the water?
c. Explain why more energy is supplied that is used to heat the water.9.Water in a plastic just was put in a fridge where it cooled from 15oC to 5oC in 600 seconds. a. If the mass of water in the jug was 0.8kg, how much energy was removed from it to reduce its temperature?
b. How much energy was remained each second?

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Please help Heat Track 2 –WorksheetPart 1:
Working with the equations.
Q = m c &...

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