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Olbers' paradox (H. Olbers; 1826):
If the Universe is uniform, infinite & unchanging then the whole sky at night would be bright regarding as bright as the Sun. The further you looked out to space, the more stars there would be, and therefore in any direction wherein you looked your line-of-sight would impinge upon a star eventually. The paradox is resolved through the big bang theory, which puts forth that the Universe is dynamic, non-uniform and (probably) finite.
How much time is required to raise the temperature of the water A family comes home from a long vacation with laundry to do and showers to take. The water heater has been turned
what is radioactivity?
Q. The minimum wavelength of X-rays produced in a Coolidge tube is 0.05 nm. Find the operating voltage of the Coolidge tube. λmin = 12400 A 0 / V = 0.5 X 10 -10 m Theref
Start from the expression of the electric field outside an infinite sheet of uniform surface charge density, E = s/2epsilon, derive the electric field just outside an ideal conduct
Q. If a dog rolled around on a carpet as well as gets statically and a flea jumps on it will the flea get electrocuted? Answer:- It will but possibly not and such experime
By what factor would the I 2 R loss in transmission wires be reduced if the transmission voltage were boosted from 220 V to 22 kV? Suppose that the rate of energy delivered is
UNIFORM VELOCITY: If a body covers equal displacements in equivalent intervals of time, though the smallest intervals may be, then the velocity of the body is said to be unifor
What is Normal Force?? Force exerted upon an object that is in get in touch with another stable object. If a book is resting upon a surface, then the surface is exerting an up
Get an expression for lateral shift produced by a parallel sided glass slab placed in air.
A right triangular prism has volume equal to 288 cm^3. The height of the prism is 3 cm. One of the bases of the triangular face (not the hypotenuse) is equal to 12 cm, determine th
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