问答题 (清华大学2006--2007学年春季学期期中考试试题)The period of oscillation T of a water surface wave is assumed to be a function of density p,wavelengthλ,depth h,gravity g,and surface tension 7.Rewrite this relationship in dimensionless form.What results if γis negligible?
【正确答案】正确答案:建立变量及关系: T=f(ρ,γ,h,g,Y) {T}={M/L 3 ){L}{L}{L/T 3 }{M/T 2 } 可得n=6,j=3。 因此: n-j=6—3=3 下列的各个Ⅱ由ρ、λ和g组成:
【答案解析】