The minimum kinetic energy of a ground state hydrogen atom required to have head-on collision with another ground state hydrogen atom but at rest to produce a photon is given by
1 Answers
Which of the followings can excite a hydrogen atom in ground state? (i) A photon having 11 eV energy (ii) A neutron having `11 eV` kinetic energy (iii
Correct Answer - An electron having `11 eV` kinetic energy.
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A light photon of wavelength `lambda_(0)` is absorbed by an atom of mass m at rest in ground state. The atom is free to move. The atom after absorbing
Correct Answer - `lambda_(0) = (2h)/(sqrt(2mk) + (k)/(c))`
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A moving H-atom makes a head on perfectly inelastic collision with a stationary `Li^(++)` ion. Just before collision, both `- H` and `Li^(++)` are in
Correct Answer - `7.77 keV`
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A free hydrogen atom in its ground state is at rest. A neutron having kinetic energy `k_(0)` collides head one with the atom. Assume that mass of both
Correct Answer - (a) `20.4 eV` , (b) `8.72 eV` or `4.19 eV`
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A hydrogen atom in ground state is moving with a kinetic energy of 30 eV. It collides with a deuterium atom in ground state at rest. The hydrogen atom
Correct Answer - `20 eV, 13.2 eV`
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In a head-on collision between an `alpha`-particle and a gold nucleus, the minimum distance of approach is `3.95 xx 10^(4)m`. Calculate the energy of
Correct Answer - 6 MeV
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A hydrogen atom moving at speed `v` collides with another hydrogen atom kept at rest .Find the minimum value of `v` for which one of the atoms may get
Correct Answer - `[7.2 xx 10^(4)m//s]`
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Find the temperature at which the everage thermal kinetic energy is equal to the energy needed to take a hydrogen atom from its ground state `n = 3` s
Correct Answer - `[9.4 xx 10^(4)K]`
2 Answers 1 views
Two bodies undergo one-dimensional, perfectly inelastic, head-on collision. Derive an expression for the loss in the kinetic energy.
USE 1) IF ELASTIC COLLISION THEN ENERGY CONSERVATION K.E.(INITIAL)=K.E.(FINAL) 2) IN INELASTIC USE MOMENTUM CONSERVATION
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20. A coconut of mass \( 2 Kg \) is falling from a coconut free of height \( 10 m \). Find the potential energy, kinetic energy and total energy at the following points. \( \left( g =10 m / s ^{2}\right) \) a) Before falling from the coconut tree. b) Just before hilting the ground. c) At a height \( 4 m \) from the ground. d) Which law is evident from this example?
(a) Given m = 2 kg h = 10 m Potential energy at before falling from the coconut tree. u = mgh u = 2 x 10 x 10 u = 200 joule Kinetic energy will...
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