29th April 2005 at 01:00
KS 3-4

The speed of light is 300,000 kms. What is this in ms, expressed in standard form? A jet fighter can travel at Mach 2. What is this in ms? What fraction of the speed of light is this? How long does it take a beam of light to travel from the sun to the earth? If the sun suddenly went out, how long would it be before we knew about it on earth? Twins paradox: if one twin goes away from the earth on a two-year round trip at a speed which causes time to stretch by a factor of three, how many years will have passed for the other twin when the twin who went away returns? When she returns home, how much younger will the twin who went be compared to her twin sister.


Investigate the Lorentz transformation and its use in calculations involving time dilation. Why does the equation mean that time appears constant for velocities normally encountered on earth? The Lorentz transformation: topiclorentz-transformation Biographies of mathematicians:

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