Maximum speed of electrons

The work function for cesium is 2.0eV. Find the maximum speed of the ejected electrons when a cesium surface is illuminated by violet light of wavelength 4.5X10^-7m.

Minimun uncertainty

Estimate the minimum uncertainty in energy that corresponds to the uncertainty in time of 1x10^-12sec.

Energy and quantum level

What is the energy of the photon emitted when the electron of a hydrogen atom makes a transition from the quantum level n=3 to the level n=1?

Photon emission during transition

The electron of a hydrogen atom is initially at the orbit n=4. If this electron first goes to the orbit n=3 and then to the orbit n=2 and then to the orbit n=1, how many photons are emitted during these transitions? How many photons are emitted if the electron directly falls from the orbit n=4 to the orbit n=1?

Energy to ionize a hydrogen atom

What is the minimum amount of energy needed to ionize a hydrogen atom in its n=2 state?

Max wavelength if a photon and ionization

Find the maximum wavelength of the photon that a hydrogen atom in its ground state must absorb in order for the ionization to occur.

Frequency and hydrogen atom transition

Find the frequency of the light that corresponds to a transition in the hydrogen atom from the n=7 state to the n=2 state.

Wavelength and hydrogen atom transition

What is the wavelength of the photon emitted by a hydrogen atom during a transition between the quantum levels n=4 and n=2?

Rotational Motion and Angular Displacement, Angular Velocity and Angular Acceleration

A Ferris wheel rotates at an angular velocity of 0.24 rad/s. Starting from rest, it reaches its operating speed with an average angular acceleration of 0.030 rad/s^2. How long does it take the wheel to come up to operating speed?

Verify a mathematical equation and edite 2 pages of writing

This is a webpage work. You should go to www.sc-innovation.com/entity.html to understand the problem. I want: 1) Verify the equation D2=Do((C^2-V^2)/C^2). The result will be posted in the appendix. 2) Edite 2 pages of writing in the attached file, for grammer, spelling and sentence structure etc.