Q11. Mach number is used in connection with the speed of
Q13. Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open
Q15. Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?
Q16. On a cold day when a room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because
Q18. Light travels at the fastest speed in
Q19. Of the following natural phenomena, tell which one known in Sanskrit as ‘deer’s thirst’?

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