Heat can be transferred through a solid by which one or more of the following? A

Question

Heat can be transferred through a solid by which one or more of the following? A. conduction B. convection C. radiation D. condensation Heat conduction is most efficient in A. metals. B. nonmetallic solids C. water. D. gases. Heat conduction is least efficient in A. metals B. nonmetallic solids. C. water D. gases. Which one of the following temperatures is approximately equal to the typical temperature of a classroom? A) 0 K B) 0 degree C C) 100 degree C D) 100 K E) 293 K Complete the following statement: A temperature decrease of 30 degree C is equal to a temperature decrease of A) 30 F^0. B) 30 K. C) 17 F^0 D) 26 F^0 E) 303 K. An absolute temperature of 100 K is the same as a Celsius temperature of A) 173 degree C. B) -273 degree C C) -212 degree C D) 373 degree C E) the correct answer is not given

Explanation / Answer

36. A.) Conduction. As conduction is transfer of heat energy without the actual transfer of molecules, but when the heat energy is transferred by sharing the energy between the molecules.d

37. A) Metals. As already explained above, metals are good conductors of heat, which makes them very efficient in heat conduction

38. B.) Non metallic solids. These solids are very opposite to the metallic solids, and restrict the flow of heat through conduction. Hence, these non metallic solids are also called as insulators.

39. E) 293 K. The normal atmospheric or room temperature is generally taken between 20-25 C, which is equal to 293-298 K.

40. B) 30 K. The change in temperature remains the same in degree Celsius or Kelvin, as the difference between the both always remains constant

41. E) The correct answer is not given. 100 Kelvin is equal to (100-273) = -173 deg C.

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