Which one of the following is a reliable measure?
(d) None of these
Answer: (c) Temperature
Name the device which is used to measure the hotness or coldness of an object.
Answer: (d) Thermometer
Which one is filled in the bulb of a thermometer?
Answer: (a) Mercury
What is the normal temperature of a healthy person?
(c) 37 K
(d) None of these
Answer: (a) 37°C
Heat always flows
(a) from a colder object to a hotter object
(b) from a hotter object to a colder object
(c) in both the directions
(d) heat never flows from one object to other
Answer: (b) from a hotter object to a colder object
Conduction is the method of transfer of heat in
Answer: (b) solids
Heat from the sun reaches to us by
(d) all of these
Answer: (a) radiation
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: (b) air trapped between the layers of newspaper is a bad conductor of heat.
A marble tile would feel cold as compared to a wooden tile on a winter morning, because the marble tile:
(a) is a better conductor of heat than the wooden tile.
(b) is polished while wooden tile is not polished.
(c) reflects more heat than wooden tile.
(d) is a poor conductor of heat than the wooden tile.
Answer: (a) is a better conductor of heat than the wooden tile.
Paheli and Boojho measured their body temperature. Paheli found her’s to be 98.6°F and Boojho recorded 37°C. Which of the following statement is true?
(a) Paheli has a higher body temperature than Boojho.
(b) Paheli has a lower body temperature than Boojho.
(c) Both have normal body temperature.
(d) Both are suffering from fever.
Answer: (c) Both have normal body temperature.