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Arabic Bulgarian Chinese Croatian Czech Danish Dutch English Estonian Finnish French German Greek Hebrew Hindi Hungarian Icelandic Indonesian Italian Japanese Korean Latvian Lithuanian Malagasy Norwegian Persian Polish Portuguese Romanian Russian Serbian Slovak Slovenian Spanish Swedish Thai Turkish Vietnamese

Definition and meaning of 마력

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마력 (n.)

황홀하게 하다

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Analogical dictionary



마력 (n.)



Wikipedia

마력

                   

마력(馬力, hp)은 일률단위이다. 마력은 정의에 따라 그 기준이 달라 SI 단위와트가 보다 더 널리 쓰인다. 마력은 자동차 산업에서 내연 기관의 일률을 나타내는 단위로 주로 쓴다. 일반적으로 hp를 많이 사용한다.

마력은 영국의 기준으로 1hp(horse power) = 745.7W이며, 프랑스의 기준으로는 1ps(pferde stärke) = 735.5W이다.

영국식 마력(hp)은 제임스 와트가 개발한 증기 기관의 성능을 재기 위해 도입했다. 이때 1마력은 영국식 단위계인 야드파운드법에 따라 길이의 단위 피트(1ft=0.3048m)와 무게의 단위 파운드(1lb=453.599082g)를 써서 550ft·lb가 되었다. 이것을 다른 일률 단위인 와트(W)로 환산하면, 영국에서 중력 가속도(g)의 값은 9.8119m/s²이므로 1HP=550×0.3048×0.453592×9.8119=약 745.7W가 된 것이다. 1마력은 이것이 설정된 1765년 당시 영국산 말 한 마리가 할 수 있는 일률이었다.

하지만 영국의 야드파운드법 대신 미터법을 사용하는 독일, 프랑스등 유럽 나라에서는 미터단위를 적용해 프랑스 마력(ps)이 나왔다. 1초 동안 질량 75kg의 물체를 1m 들어올리는 일률로 1PS = 75kgf·m/s = 75 × 9.80665N·m/s = 약 735.5W가 되었다.

   
               

 

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