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Cosmic background radiation; primal glow
The background of radiation typically in the frequency range 3 x 1011 to 3 x 108 Hz discovered in space in the year of 1965. It is supposed to be the cosmologically redshifted radiation free through the big bang itself. Currently it has an energy density in empty space of about 4 x 10-14 J/m3.
A bar magnet is overhanging north end up well above a vertical coil of wire. The bar magnet is released and as it falls down toward the coil it falls along a path that will take it
(1) The first practical application for piezoelectric devices was sonar, first developed during worldwar1. Piezoelectric materials are as a source of ultrasonic waves. At sea, they
Velocity of light in moving media, Sagnac formula and its application in optical gyroscopes In 1913, the French physicist Georges Signac published some experimental results and
Spectrum and electromagnetic radiations: What is a spectrum? Ans: A spectrum is a group of wave lengths or frequencies. What are the electromagnetic radiations? Ans:
Q. Match the units to the physical amount that is measured in those units. Answer: The major purpose of this question is to familiarize you with the jargon "physical quant
Is there any experiment to tell that water can move from lower concentration to higher Which means flows back to mountain without reversing time Could water flow upward by itself w
Resolution of Forces by Calculation: One vector was resolved into two mutually perpendicular components. So if there are several vectors each can be resolved into two
The cantilevered beam below is supported at O. F1 and F2 in kN are given in P21 and P22 respectively and act on the beam as shown. Determine the magnitude and direction of a sing
a beam of electron is incident on barrier 6eV high and 0.2 nm wide. find the energy in eV these should have if 1% of them are to get through the barrier.
Q. Collector current I c =20 mA and base current I b = 50 A. Find current gain β of a transistor. β = I C / I B = 20 X 10 -3 / 50 X 10 -6 = 400
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