Question

1. In an experiment to find the specific heat capacity of a metal, it is found that 5200 J is needed to raise the temperature of a 2 kg block by 20'C.
What value for the specific heat capacity is given by these results?
A) 130 J/(kg°C)
B) 520 J/(kg°C)
C) 52000 J/(kg°C)
D) 104000 J/(kg°C)
2. A person cannot unscrew the lid of a pot of a jam. He finds that the lid can be unscrewed after it has been held under hot, running water for a few seconds.
Why is this?
A The air pressure in the jar falls.
B The glass expands.
C The jam melts.
D The lid expands.
3. Heat energy is supplied at the same rate to 100 g of paraffin and to 100 g of water in similar containers. Why does the temperature of the paraffin rise more quickly?
A The paraffin has a larger specific heat capacity than water.
B The paraffin has a smaller specific heat capacity than water.
C The paraffin is less dense than water.
D The paraffin is more dense than water.
4. A 2 kg mass of copper is heated for 40 s by a heater that produces 100 J/s.
The specific heat capacity of copper is 400 J/(kg K).
What is the rise in temperature?
A 5K
B 10K
C 20 K
D 50 K
5. A glass jug is designed so that it does not break when boiling water is poured into it.
What sort of glass should be used?
A) thick , expands greatly when heated
B) thick , expands little when heated
C) thin , expands greatly when heated
D) thin , expands little when heated
PLEASE ANSWER ALL 5 MCQ

Answer 1

Answer:

1. 52000J/(kg°C)
2. The air pressure in the jar falls.
3. The paraffin is more dense than water.
4. 5K
5. thin,expands little when heated

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