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average speed of helium. 1255 m/s to mi/hr

by 영원파란 2021. 3. 12.

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average speed of helium. 1255 m/s to mi/hr

 

 

The average speed of helium at 25℃ is 1255 m/s.

Convert this speed to miles per hour.

[3600 seconds in an hour]

[1609.34 meters in a mile]

 

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▶ 참고: 환산인자 [ https://ywpop.tistory.com/3121 ]

 

 

 

(1255 m/s) × (1 mi / 1609.34 m) × (3600 s / 1 hr)

= (1255) × (1 / 1609.34) × (3600 / 1)

= 2807.362024...

---> 유효숫자 4개에 맞추면,

= 2807 mi/hr

 

 

 

 

(1200 m/s) × (1 mi / 1609.34 m) × (3600 s / 1 hr)

= (1200) × (1 / 1609.34) × (3600 / 1)

= 2684.3302...

---> 유효숫자 2개에 맞추면,

= 2700 mi/hr

---> 유효숫자 3개에 맞추면,

= 2680 mi/hr

---> 유효숫자 4개에 맞추면,

= 2684 mi/hr

( 참고: https://ywpop.tistory.com/10839 )

 

 

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