있어 어떤 하나의 대상에 상당하는 것을 임의의 표준, 즉 단위(unit)로 정하여 다의 것을 그 단위량의 비로서 표현하고, 수량적으로 표시하는 것 (오차를 보정하여 계산한 오차범위 표기)
* C.G.S. 단위 : 길이 centimeter(cm), 질량 gram, 시간 second를 기본단위로 공통약속
1-2. 측정과 단위(Units ofMeasurement)
of total costs : 전체 비용 중 자본비용 비율
⑦ aeronautical costs per WLU : 1WLU당 항공분야 비용
2) 노동생산성 5개 (labour productivity)
① WLU per employee : 고용인당 WLU
② total revenue per employee : 고용인당 전체수익
③ value added per employee : 고용인당 부가가치
④ value added per unitof staff plus capital costs : 직원과 자
Measurement of Young's modulus using sonic resonance
The principal idea behind the sonic resonance test method can be explained using the equation by which one can measure the propagating speed of flexural sonic wave through a medium
(1)
where v is the propagating speed of the flexural wave on a string, F is the tension applied to both sides of the string, P is the mass per unit leng
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measure of the amount of electrical energy stored for a given electric potential. Capacitance is directly proportional to the surface area of the conductor plates and inversely proportional to the separation distance between the plates. If the charges on the plates are +Q and −Q, and V gives the voltage between the plates, then the capacitance is given by
C= Q/V
SI unitof capacitance is