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Thermopile works on the principle of
These waves cannot be transmitted through vacuum
This scientist gave the law- ‘Properties of elements are a periodic function of their atomic number.’ This property of the fundamental importance of atomic number was discovered by
Threshold limit value of copper in the atmospheric air is
Through which light cannot pass?
Through which one among the following materials does sound travel slowest?
Time period of a simple pendulum is 1.5 sec. If the length of the pendulum is increased by 4 times then what is the new time period.
To convert Ac to DC
To convert temperature from Celcius to Kelvin scale, you must _ the given temperature.
To hear a clear echo, the minimum distance should be
