60 ms-1 = 216 km/h
60 m every second
→ 60 x 3600 m every hour
= 216000 m per hour
= 216000 ÷ 1000 km per hour
= 216 km/h
The appropriate unit of measurement would be meters.
To convert meters per second to kilometers per hour, multiply by 3.6.
Multiply meters by 0.001 to get kilometers. Like for example 2 meters would be expressed as 0.002 in kilometers.
5.68 kilometers = 5,680 meters
3706 kilometers is greater. If converted into meters, it would equal 3,706,000 meters. 376,000 meters would equal 376 kilometers
75 kilometers=75,000 meters
You cannot convert 400 meters to 3 kilometers. They are two different lengths. 1 kilometer = 1,000 meters. 3 kilometers would be 3,000 meters. 400 meters would be 0.4 kilometers
117 feet is ~35.66 meters.
10 kilometers = 10000 meters
meters
In order to convert meters to kilometers you would go meters divided by 1000 = kilometers. So your answer is 0.0057104.
It would appear you are mixing units, that is measures of distance and measures of time. However, it may be that you are referring to "light minutes", as such measure distance as well. Given that the speed of light in a vacuum is 299,792,458 per second, this would mean that one light minute would be 17,987,547,480 kilometers. We can readily see by this that such a small distance as thirty kilometers could only be expressed in a fraction of a light minute, and indeed would be only a fraction of a light second. If we take 299,792,458 kilometers and divide it by 30 kilometers, we see that 1/9,993,082th of a light second is about thirty kilometers. Therefore, in answer to "How long is thirty kilometers expressed in light seconds?", the answer is roughly 1/10 millionth of a light second.