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Hertz; Hz (after H. Hertz, 1857-1894)
The derived SI unit of frequency, explained as a frequency of 1 cycle per s; therefore it has units of s-1.
A thin uniform rectangular sign hangs vertically above the door of a shop. The sign is hinged to a stationary horizontal rod along its top edge. The mass of the sign is 2.40 kg and
In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. For example, the note at 110 Hz has two strings at this frequency.
The central part (photosphere) of the sun is very hot and all possible wavelengths of the visible light. Though, the outer part (chromospheres) having of vapours of dissimilar com
A worker lifts a 10 kilogram block a vertical height of 2 meters. The work he does on the block is: a) 5 Joules b) 20 Joules c) 49 Joules d) 200 Joules Ans:
Very thin glass sheets are used to form these capacitors. The sheets are interleaved with aluminium foil and fused together to forms a solid block. These capacitors are smaller in
(Assume the metallic ball is spherical with a diameter d = 2.5 cm. Let''s also assume it is made out of nickel, which has a density of roughly 9 g/cm 3 .) After it first touches
Illustrate the light emitting diode for fibre optic communication? Light-Emitting Diode (LED) for fibre optic communication: There are two types of LED. They are surface etc
A skydiver falls d1 = 495 meters in t1 = 22 s before opening his parachute. After the chute opens, he falls an additional d2 = 470 meters in t2 = 56.5 s. (a) Write an expression t
a) Three equivalent charges 2.0 micro coulomb each, are held fixed at the three corners of an equilateral triangle of side 5 cm. Determine the Coulomb force experienced at its cent
Explain about the monochromaticity of laser. Monochromaticity: The light emitted through a laser is monochromatic, that is this is of one wavelength (colour). Although in ca
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