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Suppose that the x rays are emitted from a focal spot isotropically. The photon flux is 3.28 x 106 photons mm-2 sec-1 at a distance of 0.75 m from the focal spot. What is the photon flux at a distance of 10 cm from the focal spot? Neglect the effects of air attenuation.
Charging: During charging the device is linked across a source of D.C. supply having a voltage of about 3 volts. When the circuit is switched on the current flows inside the cell
Is it determined by acceleration or velocity? Force or momentum?
Define Rocket in Drag (Princeton)? A rocket has an effectual frontal area A and blasts off with a constant acceleration a straight up from the surface of the Earth. a)
Q. Explain what is light? Light is certainly electromagnetic radiation but the expression electromagnetic radiation is by no means an explanation of what light is. Light is a w
the theory for this motion
Adolf and Ed are wearing harnesses and are hanging from the ceiling by means of ropes attached to them. They are face to face and push off against one another. Adolf has a mass of
Isaac Newton’s Scam Spectrum – Several ways to make it observable and how they disprove his colour theory R.S.W.Bobbette 2018 Physicists, without question, believe Is
Wave-particle duality: The principle of quantum mechanics that implies that light (and, indeed, all other subatomic particles) sometimes work as a wave, and sometime like a pa
Iron is what type of magnetic material? Is it: a) Diamagnetic b) Paramagnetic c) Ferromagnetic d) Non-magnetic Ans: Iron is ferromagnetic type of m
During light activity, a 70-kg person may generate 200 kcal /h. Assuming that 20% of this goes into useful work and the other80% is converted to heat, calculate the temperature ris
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