What is the main constituent of coal gas?
12. Recoil of a gun is an example of
A. Conservation of mass
B. conservation of energy
C. conservation into KE
D. conservation of linear momentum
13. What is the heaviest of the naturally occurring Noble gases?
14. Aviation fuel for Jet aero planes consists of purified
15. A piece of stone and or iron traveling through space that moves through the earth’s atmosphere is
16. Which one of the following common devices works on the basis of the principle of mutual induction?
A. Tube light
17. Dc current can be controlled by which one of the following components?