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Cosmological redshift An effect where light emitted through a distant source seems redshifted due to the expansion of spacetime itself.
X-rays was discovered by scientist Rontgen that's why they are also known as Rontgen pulses. Rontgen discovered that when pressure inside a discharge tube kept 10 -3 mm of Hg a
Are made up of alloys (manganin, constantan or nichrome) these materials have moderate Resistivity which is practically independent of temperature so that the specified value of re
Falling bodies If you can search a building that is about 20 m high in your locality you can examine how gravity makes bodies fall faster the longer it acts on them. Get a piec
The substances which acquire charges on rubbing are said to be charged. The electricity produced by friction is called Frictional force. If the charges do not move, then the frict
is door a example of translatory motion
A copper rod which is 1 centimetre in diameter carries a current of 5 amps. The current is distributed uniformly throughout the rod. The magnetic field half way between the axis
why gravitational energy for a system of particles is found by first finding the gravitational energy between individual particles and then adding it up? Ans) It is a scalar qua
Metallurgical Industry:- Variable speed DC drives are being use usually now variable frequency AC drives using squirrel cage motors
what is like and unlike forces
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