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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 1200-kg cannon is placed at rest on an ice rink. A 95.0-kg cannonball is shot from the cannon. If the cannon recoils at a speed of 6.80 m/s. What is the speed of the canno
Forces: If a Force is applied to a body, it will cause that body to move. A body that is already moving will change its speed or direction. Note that the term 'change its spe
what condition is necessary for heat transfer occur
Feeling centrifugal force Tie a weight to a string about a metre in length and then whirl the weight around at arm's length. View the outward pull on the string. This is centri
Printing Paper Industry: Synchronous motors are used in grinders. DC drives are used for pumping pulp and refining it.
Refractive Astronomical Telescope: It is an optical instrument which is used to see heavenly bodies such as stars, moon and planets is known as telescope. Astronomical teles
A car of mass 1.35 x 10 3 kg sits on a large piston that has a surface area of 1.23 m 2 . The large piston is linked to a small piston of area 144 cm 2 . What is the weight
Q. Point out the direction of the current if any induced to flow in the loop by the changing magnetic field. (Describe is the loop as viewed from above.)s Answer: 1.
Natural and forced vibrations When we strike a tuning fork with a rubber hammer it vibrates with certain frequency. The frequency does not change even if we hit it harder.
The Moon is a satellite of the Earth. The Moon takes one full revolution around the Earth in 27.3 days. Given that the mass of the Earth is 5.97 x 1024 kg, what is the avera
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