Top answers

Physics
A Level

If an alpha particle (Z = 2) of kinetic energy 7 MeV is incident on a gold nucleus (Z = 79), what is its closest distance of approach?

In Rutherford Scattering, an incident particle will reach the closest distance of approach when it is on a collision course head on with the target nucleus. At the closest distance of approach, the alpha ...

Answered by Robert N. Physics tutor
3586 Views

What does the photoelectric effect demonstrate?

The dual nature of light. Sometimes it behaves as a particle, sometimes as a wave.

Answered by Dario M. Physics tutor
1401 Views

When light above the threshold frequency of a metal is shone on the metal, photoelectrons are emitted. If the power of the light halves, are the maximum kinetic energy of the photoelectrons and/or the number of photoelectrons altered, and if so, how?

When the power of the light is halved, there are half as many photons per unit time. Therefore, the number of photoelectrons emitted is also halved. The maximum kinetic energy of the photoelectrons depend...

Answered by Sam S. Physics tutor
1381 Views

Describe an experiment, using a pendulum, which can be conducted to investigate g, acceleration due to gravity.

Set up a clamp stand with pendulum bob hanging from a thread attached to the top of the clamp stand. Set up a protractor where the thread is attached to the stand. Set up a fiduciary marker as a point of ...

Answered by Ilyas S. Physics tutor
2860 Views

Is the excitation and de-excitation of an electron from the ground state (of an atom) due to the collision of another particle (e.g. electron) an elastic collision or an inelastic collision.

It is an elastic collision. This is because, when a particle collides with the electron of an atom, a discrete amount of energy is transferred from the particle to the electron. This discrete amount of en...

Answered by Akthar Hussain M. Physics tutor
1739 Views

We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences