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6 Oct 2020
(a) The distance to Polaris, the North Star, is approximately 6.44 × 10 18 m. If Polaris were to burn out today, how many wars would it take to see it disappear? (b) How long does it take sunlight to reach the earth? (c) How long does it take a microwave signal to travel from earth to the moon and back? (The distance from Earth to the moon is 3.84 x 105 km.)
(a) The distance to Polaris, the North Star, is approximately 6.44 × 10 18 m. If Polaris were to burn out today, how many wars would it take to see it disappear? (b) How long does it take sunlight to reach the earth? (c) How long does it take a microwave signal to travel from earth to the moon and back? (The distance from Earth to the moon is 3.84 x 105 km.)
SACHIN KUMARLv8
24 Nov 2020
