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1416. Which of the following is the correct combination of the inventors and the inventions ?
A. Galileo Galilei - Transistors
B. Elisha Thomson - Windmill
C. J.L. Baird - Television
D. Sir Frank Whittle - Laser
Explanation:
1417. Production of chloroflurocarbons (CFC) gas which of the following domestic products ?
A. Television
B. Tubelight
C. Cooking gas
D. Refrigerator
Explanation:
1418. The main important feature of neutron bomb is that when it is dropped on a city, it would damage :
A. both the living organisms and buildings
B. the buildings but not the living organisms
C. the living organisms but spare buildings
D. none of these
Explanation:
1419. Every object at a temperature above absolute zero :
A. radiates energy
B. occupies less space than it would at absolute zero
C. is a good heat insulator
D. must receive heat by convection
Explanation:
1420. A cup of hot tea on a metal table in a room loses heat by :
A. conduction and convection
B. conduction, convection, radiation and evaporation
C. conduction and evaporation
D. conduction and radiation
Explanation:
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