Q. A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because:
A. friction between the layers of newspaper produces heat.
B. air trapped between the layers of newspaper is a bad conductor of heat.
C. newspaper is a conductor of heat.
D. newspaper is at a higher temperature than the temperature of the surroundiong.
Answer: air trapped between the layers of newspaper is a bad conductor of heat.
