How fast would you have to go, in km/hr?
Express your answer using two significant figures.
v =
Suppose you wanted to reach Alpha Centauri in 150 years?
2009-09-20 5:53 pm
回答 (5)
2009-09-20 6:21 pm
✔ 最佳答案
Alpha Centauri is about 4.37 light years away from Earth.4.37 is 2.913% of 150, so a speed that takes 150 years to reach it will be 2.913% the speed of light
The speed of light is approximately 1,079,000,000 km/h
2.913% of 1,079,000,000 = 31,431,270 km/h
2009-09-20 5:56 pm
speed = distance / time
2009-09-20 6:23 pm
If you wanted to take 150 years you would have to go a small percentage of the speed of light still much faster than anything we have now, so it would be roughly 2.8% the speed of light.
Which can be attained using Orion technology which is only known technology we have that can reach that speed.
So that would be 30,938,582 Km/hr
Which can be attained using Orion technology which is only known technology we have that can reach that speed.
So that would be 30,938,582 Km/hr
2009-09-20 6:29 pm
Why not calculate it yourself? It's simple enough. You're going about 4.23 light years and a light year is about 5.6 trillion miles. The speed of light is 186,000 miles a second.
Grab your calculator and have at it.
Grab your calculator and have at it.
2009-09-20 6:14 pm
A back of the envelope calculation shows that your average speed would have to be something like 19,000,000 mph or nearly 5,300 miles per second to reach Alpha Centauri in 150 years.
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