Which of the following is mainly used for light patrol engines ?

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1. Optic fibers are mainly used for which of the following:

   A. Communication B. Weaving C. Food indudtry D. None of these Submitted by: Fahad Mehsud...

2. Which one of the following wavelengths of light is most effective in photosynthesis?

   A. Blue B. Green C. Orange D. Yellow Submitted by: Malik Asghar Hussain...

3. Which of the following phenomena of light are involved in the formation of a rainbow?

   A. Refraction B. Dispersion C. Total internal reflection D. All of the above Submitted by: Safdar Abbas...

4. The atmospheric greenhouse effect is produced mainly by the __________________?

   A. Absorption and re-emission of visible light by the atmosphere B. Absorption and re-emission of ultraviolet radiation by the atmosphere C. Absorption and re-emission of infrared radiation by the atmosphere D. Absorption and re-emission of visible light by clouds E. Absorption and re-emission of visible light by the ground Submitted by: Mansoor Ul Haque...

5. The temperature at which water boils depends mainly on ____________?

   A. Air temperature B. Relative humidity C. Air pressure D. Air density E. The specific heat of air Submitted by: Mansoor Ul Haque...

6. what are stars mainly made of ?

   A. Balls of gass B. Rock C. Ice D. Light Submitted by: Farjan Ahmed Soomro...

7. LPG consists of mainly:___________?

   A. Methane, Ethane and Hexane B. Ethane, Hexane and Nonane C. Methane, Hexane and Nonane D. Methane, Butane and Propane Submitted by: Muhammad Ali Kunbhar...

8. The ‘Solar Corona’ mainly consists of?

   A. Gases B. Ice C. Molten lava D. Cosmic rays Submitted by: Saqlain hydar...

9. LPG consists mainly of : ___________?

   A. Methane,Ethane & Hexane B. Ethane,Hexane &Nonane C. Methane,Butane & Propane D. All of these Submitted by: Fahad Mehsud...

10. Titan, a moon of __________ , and Triton, a moon of _________ , have atmospheres mainly of _________.

    A. Saturn, Jupiter, Hydrogen B. Uranus, Neptune, Nitrogen C. Saturn, Neptune, Nitrogen D. Mars, Venus, Hydrogen Submitted by: Muhammad Abdullah...