Question
The student repeated the investigation but wrapped insulation around the iron block. What effect will adding insulation have had on the investigation? [2 marks] Tick (surd ) two boxes. The calculated specific heat capacity will be more accurate. square The iron block will transfer thermal energy to the surroundings at a lower rate. square The power output of the heater will be lower than expected. square The temperature of the iron block will increase more slowly than expected. square The uncertainty in the temperature measurement will be greater. square
Answer
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Ellis
Master · Tutor for 5 years
Answer
1. ![Explanation]: Wrapping insulation around the iron block would aim to decrease heat loss to the surroundings. In effect, heat transfer to the surroundings becomes slower, leading to a more efficient combination of the energy supplied and the temperature rise. Hence, the aim of using the insulator is to arrive at a more accurate depiction of the actual heating process with minimal interference from the external environment. As such, the calculated specific heat capacity will be enhanced regarding accuracy.2.[Explanation]: The purpose of an insulator is to slow down the transfer of thermal energy. So wrapping an iron block with insulation would result in the iron block giving off thermal energy to its surroundings at a reduced speed.Thus, according to the explanations above, The correct options are:- The calculated specific heat capacity will be more accurate.- The iron block will transfer thermal energy to the surroundings at a lower rate.【Answer】: The calculated specific heat capacity will be more accurate and the iron block will transfer thermal energy to the surroundings at a lower rate.