A sound wave has a frequency of 4 kHz and a wavelength of 40 cm. The time taken by the sound wave to travel a distance of 3.2 km is
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Which of the following is a renewable source of energy?
Humidity is a measure of the _______________.
Which instrument is used for measuring humidity of atmosphere?
The material used in electric heater is
The color with the longest wavelength is
Each color has a different wavelength.
Red has the longest wavelength and violet has the shortest wavelength.
A current I flows through a resistor. A source maintains a potential difference of V across the resistor. The energy supplied by the source in time t is
Cold air is ______.
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