Home

A balloon ruled with hydrogen will

A. continue going upwards uninterrupted

B. reach a particular height and remain floating

C. burst after reaching some height

D. reach a particular height and start coming down

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. A device used to measure heights above sea level is known as
  2. A pair of stars that revolve round each other is
  3. One can be recognised by his voice alone due to the factor of
  4. The hydraulic jack to lift heavy vehicles in automobile service stations is one of the applications…
  5. The Milky Way is
  6. Enriched uranium means
  7. The mixing up of two gases as a result of random motion of molecules is called
  8. Hydrophone is an instrument used
  9. If a body is taken from the earth to the moon
  10. The escape velocity of a satellite projected from the surface of the earth is independent of
  11. The heat generated in a conductor carrying current is proportional to
  12. When we tighten the string of a sitar or tanpura its pitch
  13. Sun spots are
  14. Halley's comet appears in the heavens once in
  15. Where does the centre of gravity of a rubber ring lie?
  16. If an empty cylinder Is half ruled with a liquid, Its centre of gravity is
  17. The method used to separate aluminium from a alumina is
  18. We see the flash of lightning before hearing the thunder because
  19. A rod of brass la held in hand and rubbed with fur. The rod is found to have
  20. The power of a lens is
  21. Choose the correct answer
  22. The speed of sound in a medium depends upon the properties of the medium such as
  23. A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks…
  24. Why is nuclear fusion also known as thermonuclear reaction?
  25. Rays similar to X-rays but of smaller wave length that are given off by radioactive substances are
  26. When a body is projected upwards
  27. The orbit of Venus lies between those of
  28. The barometer was invented by
  29. In compact porous soil, the rising of the water is due to
  30. Of the following types of electromagnetic radiation which has the longest wavelength?