The distance to a star is approximately 450 x 1018 meter if


(a) The distance to a star is approximately 4.50 x 1018 meter. If this star were to burn out today, in how many years would we see it disappear?

years

(b) Find how long does it take for sunlight to reach Mars?

minutes

(c) Find how long does it take for a microwave radar signal to travel from Earth to the Moon and back?

s

(d) Find how long does it take for a radio wave to travel once around the Earth in a great circle, close to the planet's surface?

s

(e) Find how long does it take for light to reach you from a lightning stroke 9.1 km away?

s

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Physics: The distance to a star is approximately 450 x 1018 meter if
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