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An isotope of iodine (Z = 53) is used to treat thyroid conditions. Its mass number is 131. How many neutrons are in its nucleus? 131 - 53 = 78 neutrons
what is quatum number
COHERENCE : 1) Visible light energy is emitted when the excited electrons in atoms undergo transitions to the ground state. 2) In ordinary light sources, these transitions
(i)Most of the alpha-particles pass by the foil straight away undeflected. (ii)Some of them are deflected by small angles. (iii)A few alpha-particles (1 in 1000) are deflecte
VELOCITY- TIME GRAPH: The graphs which represents the variation of velocity of an object with respect to time is known as velocity- time graph.
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A simple inclined plane Join a spring balance to a toy car or roller skate and pull it up a slanting board (inclined plane). Note the force needed to move the car and compare i
what is wedge constraint? explain with example.
Randomly polarized light (such as sun light) with intensity of I 0 passes through three polarizers (P 1 , P 2 , P 3 ) consecutively. P 1 and P 3 are stationary, and their polar
Q. Illustrate what is larger the force the earth exerts on you or the force you exert on the earth? Answer:- A non-scientist's preliminary stab at this If you are talking
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