All the useful equations provided on the first slide for revision, further explanation, directed questioning on meaning of symbols, etc.

Three examples covered. For each, information is supplied in stages, at each stage students use appropriate equations to calculate quantities and correct answer is then revealed.

Orbit of Solar System within Milky Way Galaxy

Students calculate speed of Solar System in orbit given length of galactic year, radius of orbit and speed of light

Students calculate centripetal force on Solar System given the mass

Students calculate estimate of the mass of Milky Way given equation for gravitational force and gravitation constant

Protons in Large Hadron Collider

Students calculate speed of protons given their kinetic energy and relativistic mass

Students calculate centripetal force given circumference of LHC

Students calculate magnetic flux density given equation for magnetic force and charge on proton

Electrons in simplified nitrogen atom (all electrons have identical orbit)

Students calculate charge on nitrogen nucleus given composition and elementary charge

Students calculate mass of nucleus given proton and neutron mass

Students estimate centripetal force given diameter of atom, equation for electric force and value for 1/(4pe_0 )

Students estimate speed of each electron given mass of electron

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File Name | File Type | File Size |
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Microsoft Powerpoint | 2.3MB |

The author recommends that this resource is useful for teachers of the following subjects. The list is not exhaustive and the resource may apply to other subjects and areas that are not listed.

R S

Teacher (retired)

I taught physics and electronics for over 30 years, mainly at A level in sixth form colleges. Quite a few years ago I wrote several physics books and contributed to others, it was so long ago I am sure they must all be out of print. In addition I have worked for the OU in the past and still do some examining work.

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