What is the minimum uncertainty in energy (in micro-eV) of a particle with average energy 2.1 eV and a lifetime of 1.9 ns. Give your answer to 3d.p.
What is the minimum uncertainty in energy (in micro-eV) of a particle with average energy 2.1...
Part B The uncertainty ?p sets a lower bound on the average momentum of a particle in the nucleus. If a particle's average momentum were to fall below that point, then the uncertainty principle would be violated. Since the uncertainty principle is a fundamental law of physics, this cannot happen. Using ?p=2.1×10?20 kilogram-meters per second as the minimum momentum of a particle in the nucleus, find the minimum kinetic energy Kmin of the particle. Use m=1.7×10?27 kilograms as the mass...
The uncertainty in an electron's position is 0.005 nm. What is the minimum uncertainty delta p in its momentum? Express your answer using two significant figures. delta p_min kg middot m/s What is the kinetic energy of an electron whose momentum is equal to this uncertainty (delta p = p)? Express your answer using two significant figures. K = 381.6 eV
A nucleus emits a gamma ray of energy 0.511 MeV from a state that has a lifetime of 1.5 ns. What is the uncertainty in the energy of the gamma ray? (give units of eV) Please answer correctly, or else would be reported.
A particle in a box of length L. has energy E1- 2.0 eV. The same particle in a box of length Lb has energy E,-50.0 eV. a. What is the ratio La/ Lb? Show your working. The figure below shows a standing de Broglie wave b. Does this standing wave represent a particle that travels back and forth between the boundaries with a constant speed or a changing speed? Support your answer with an appropriate explanation. c. If the speed...
Q1: The energy of the decay products of a particular short-lived particle has an uncertainty of 0.75 MeV. (1): What is the smallest lifetime, in seconds, the particle can have?
What is the maximum kinetic energy in eV of electrons ejected from sodium metal by 2.1 x 102-nm EM radiation, given that the binding energy is 2.28 eV? Your answer should be a number with two decimal places, do not include unit.
The energy of particles produced in a particle accelerator are measured. According to quantum physics principles, what is the minimum time necessary to make an energy measurement with an uncertainty of 25e-5 eV?
There is an uncertainty principle for energy and time ∆E∆t ≥ ¯h/2 . This relationship can be applied to the excited state energies and their lifetimes of atoms and molecules. a) Show that both sides of the expression for time-energy uncertainty relationship have the same units. b) If the lifetime of a molecule at its excited state is 1 nanosecond, what is the uncertainty of the energy (in eV) of this state? c) If a 10-femtosecond laser is used to...
If a particle is in a box with a ground state energy of 4 eV, what energy must be absorbed by the system to go from the n = 2 state to the n = 3 state?
The energy of the first excited state of a hydrogen atom is -0.34 eV ± 0.0003 eV. What is the average lifetime for this state?