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A helium atom is in a galaxy travelling at a speed of 4.89 x 106 m/s away from the Earth.
An astronomer on Earth observes a frequency from the helium atom of 6.52 x 1014 Hz.
What frequency of light is emitted from the helium atom?
An equilateral triangle is inscribed in a circle of radius 2 cm if P lies inside the triangle then the minimum sum of distances of P from the sides of the triangle is? Ans
The end of a pipe is inserted into water. A tuning fork is held over the pipe. If the pipe resonates at lengths of 15 cm and 35 cm, what is the frequency of the tuning for
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why the condition of maxima is changed in thin films
if a big person and a small person run up the stairs in the same time, which of them develops the most power
Uses of Ultrasonics: 1. Ultrasonic are used in diagnosis of disease, physical therapy as surgical tool & industry. 2. They are used in sounding devices to calculate the dept
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The physical value which does not depend on any other physical quantity is known as a fundamental physical quantity like length; mass and time are known as fundamental units.
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