Question

For your choice.
A metal spoon is placed in one of two identical cups of hot coffee. Why does the cup with the spoon have a lower
temperature after a few minutes ?
Which would be suitable for measuring temperatures at the Arctic - an alcohol thermometer or a mercun
thermometer ?
What temperature on the Celsius scale is equivalent to 373 K?
Short answer type questions
3 Marks]
Take a test tube and fill more than half of it with water. Now take an ice cube and wrap it with a wire gauze an
put it at the bottom of the test tube. Boil the water from above. It will be observed that the water at the top
the test tube starts boiling but the ice does not melt. Why?
ice cube
wrapped in
wire gauze
Which would you prefer to use during winter, two thin woolen blankets or a thick woolen blanket? Give reasons​

Answer 1

Answer:

1. Because some of the heat of coffee is transferred to the spoon

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