The direction of heat flow between two objects depends on

A. their heat contents

B. their masses

C. their temperatures

D. whether they are in solid, liquid or gaseous state

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  1. A permanent magnet may be demagnetised by
  2. The electron has a mass equal to
  3. A device used in a ship for the purpose of measuring the depth of the sea is
  4. The inside of both the walls of a thermos flask is silvered i.e., on the vacuum side in order to reduce…
  5. The speed of sound in a medium depends upon the properties of the medium such as
  6. Which of the following is fissionable?
  7. Which is the densest planet of the solar system?
  8. A pressure gauge for fluids is called
  9. A hunter on the ground wishes to shoot a bird on a tree at a distance with his rifle. He has to point…
  10. Lightning is produced when
  11. The direction of heat flow between two objects depends on
  12. Bats flying in the dark avoid obstacles because
  13. Water kept in an earthen pot is less cool on rainy days than in summer because during the rainy days
  14. The brightest star visible to the naked eye is
  15. The orbit of Venus lies between those of
  16. When a bullet is fired from a gun
  17. When we sweat, we feel comfortable under a fan because
  18. The distance between two bodies is halved. Now the force of attraction between them will be
  19. When a charged rod is brought near a collection of small pith balls, the balls
  20. Why is nuclear fusion also known as thermonuclear reaction?
  21. A sensitive instrument susceptible to magnetic infiuence can be protected from external magnetic field…
  22. Who first established the fact that the earth revolves round the sun?
  23. The filament used in the electric lamp is made of
  24. When temperature decreases, resistance of metals to flow of electricity
  25. The aneroid barometer uses
  26. A thermostat is a device used
  27. When a body is partly or wholly immersed in a liquid the apparent loss of weight is equal to the weight…
  28. Of the following types of electromagnetic radiation which has the longest wavelength?
  29. The Solar System lies near the edge of a galaxy known as
  30. The strength of an electromagnet can be increased by