Physics - Study Mode
[#961] Gasoline is useful in cars because it has
Correct Answer
(A) Chemical potential energy
Explanation
Solution: Gasoline is a colorless petroleum-derived flammable liquid that is used primarily as a fuel in spark-ignited internal combustion engines. It consists mostly of organic compounds obtained by the fractional distillation of petroleum, enhanced with a variety of additives. It is also called as Petrol. It has chemical potential energy, in combustion it is turned into light, sound, heat and kinetic energy.
[#962] Electric Motor converts ________ energy to mechanical energy
Correct Answer
(D) Electrical
Explanation
Solution: Electric Motor converts electrical energy to mechanical energy.
[#963] Why does ice covered in sawdust not melt quickly ?
Correct Answer
(C) Sawdust is a bad conductor of heat
Explanation
Solution: Ice packed in sawdust does not melt quickly because it provides insulation.
[#964] Ice is packed in saw dust because
Correct Answer
(B) Saw dust is poor conductor of heat.
Explanation
Solution: Ice packed in sawdust does not melt quickly because it provides insulation.
[#965] In general, which is the cause of a sea breeze?
Correct Answer
(B) Specific heat
Explanation
Solution: The usual cause of sea breeze is the difference in specific heat capacity between land and water Land heats and cools more quickly than water.