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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
Briefly explain the conditions for clear vision of interference fringes.
What is huygens principle and explain its applications?
Q Calculate the longest wavelength that can be analysed by a rock salt crystal of spacing d = 2.82 Ao in the first order. Data: d = 2.82 Å = 2.82 × 10-10 m; n = 1 ; λmax = ?
An elevator is stopped at the ground floor. It starts moving upwards at constant acceleration for 5 seconds. It then keeps a constant speed for 35 seconds. Finally, it slows down
law of successive disintegration in radioactivity
derivation by calculas method of Snth = (Sn – Sn -1) = u + a/2 (2n – 1)
At 400.0 K, germanium has 1.13 x 10 15 free electrons/cm 3 . How many free electrons per Ge atom are there at this temperature? At 400.0 K, silicon has 4.54 x 10 12 free
Can any heat exist without some source of friction?
calculate the frequency of radiation which must be incident on a substance placed in magnetic field strength so that the electron can absorb energy
Inertial Frame of Reference : If in a given system a free object does not experience any acceleration or force, the system is called the inertial frame. Any reference frame that mo
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