Top answers

Physics
All levels

Explain why a jet fighter pilot experiences "weightlessness" when at the top of a loop-the-loop manoeuvre.

The the pilot will experience two forces acting upon him in opposing directions: gravity and centripetal force. The centripetal force will act outwards from the jet's circular path i.e. towards space; gra...

Answered by Isaac F. Physics tutor
3553 Views

In terms of the photoelectric effect, what is the work function of a material?

It is the work done (or energy) required to remove an electron from its surface. This information is used a lot in Einstein's Nobel prize winning Photoelectric effect experiment and theory.

Answered by Physics tutor
1463 Views

What are the two types of waves and what are some of their uses/sources?

Transverse:Radio signalsElectromagnetic radiationTVPhone serviceOcean wavesLongitudinal:Seismic wavesSound wavesect.

Answered by Physics tutor
1442 Views

Describe how the strong nuclear force between two nucleons varies with the separation of the nucleons, quoting suitable values for separation.

The strong nuclear force is repulsive for nucleon separations less than 0.5 femtometres but doesn't act at roughly 1 femtometre. It becomes attractive between 1 femtometre and 3-4 femtometres, afterwhich ...

Answered by Physics tutor
2339 Views

A spacecraft called Deep Space 1, mass 486 kg, uses an “ion-drive” engine which expels 0.13 kg of xenon propellant each day at 30kms^-1. What is the initial increase in speed of the spacecraft

Use conservation of momentum (p=mv).Momentum of Xenon = 0.13 kg × 30000 m s^-1 = 3900 kg m s^-1Momentum of spacecraft = 486 kg × vv=3900kgms^−1 /486kg=8.02ms^−1

Answered by Physics tutor
2361 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