一横波沿绳子传播,其波的表达式为y=0.05cos (100pi t-2pi x)(SI)则此波的波长,频率,和波速为 A. lambda =2.0 m,v=50 Hz,u=30 m/s B. lambda =1.0 m,V=50 Hz,u=50 m/s) C. lambda =3.0 m,V=60 Hz,u=50 m/s) D. lambda =1.0 m,v=60 Hz,u=60 m/s

$$ 一横波沿绳子传播,其波的表达式为y=0.05\cos (100\pi t-2\pi x)(SI)则此波的波长,频率,和波速为 $$

• A. $$ \lambda =2.0\ \ m,v=50\ \ Hz,u=30\ \ m/s $$
• B. $$ \lambda =1.0\ \ m,V=50\ \ Hz,u=50\ \ m/s) $$
• C. $$ \lambda =3.0\ \ m,V=60\ \ Hz,u=50\ \ m/s) $$
• D. $$ \lambda =1.0\ \ m,v=60\ \ Hz,u=60\ \ m/s $$