Sound travels at the fastest speed in
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Oil raise up the wick in a lamp. The principle involves
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Superconductors are substances which
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Light travels at the fastest speed in:
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Railway tracks are banked on curves
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On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because
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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?
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Intensity of sound at a point is ____ its distance from the source.
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Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open
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Radio telescopes are better than optical telescopes because
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Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
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Out of the following pairs, which one does not have identical dimension?
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Mercury is commonly used as a thermometric fluid rather than water because
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Optical fibre works on the
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Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
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Supersonic plane fly with the speed
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Mach number is used in connection with the speed of
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On a stationary sail boat, air is blown from a fan attached to the boat. The boat
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Rainbow is due to
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Stars which appear single to the naked eye but are double when seen through a telescope are
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