3 years ago

How long (in years) does it take light from Barnard's Star to reach us 5.6 ✕ 1013 km away (c = 3 ✕ 105 km/s)?

Mathematics

1 answer:

horrorfan [7]3 years ago

5 0

Answer:

18km/sec

Step-by-step explanation:

1 sec = 3×105 km

3600 sec = 1 hr = ?

3*105×3600 km is travelled in 1 hr

5.6×1013 km - ?

5.6×1013÷(3*105*3600)

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