Explain the advantages of a reflecting telescope compared to a refracting telescope
Mirrors can be made much larger than lenses (meters compared to around 1m max). Mirrors do not produce chromatic aberration. Mirror glass does not need to be as high quality as lens glass. Mirrors produce less circular aberration than lenses
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All answers ▸How would you explain general relativity?
If two cars are moving, labelled car A and car B. Car A moves at 15 m/s and B at 10 m/s but car B also accelerated at 2 m/s/s. If the two both travel for ten seconds, which car will travel further?
A ball is initially at rest and is dropped from a height of 10m. Calculate the velocity of the ball when it reaches the ground
A pendulum of mass m is released from height h with a speed v at the bottom of its swing. a) What is the gravitational potential energy at height h and the kinetic energy at the bottom of its swing? b) Use conservation of energy to define the speed v.