一平面简谐波的波动方程为y=0.1 cos(303c0t-03c0x+03c0)(SI),t=0时的波形曲线如题图所示,则b7a1452c1f37541528bd0e404c2562a3.png
举一反三
- 在0~4π 区间绘制y=5cos(10t+π/3)关系曲线,下述哪个程序正确? A: t=0:4*pi, y=5cos(10t+pi/3) B: t=0:0.1:4π, y=5*cos(10*t+π/3) C: t=0:4π, y=5*cos(10*t+π/3) D: t=0:0.1:4*pi, y=5*cos(10*t+pi/3)
- 一平面简谐波沿x轴正方向传播,振幅A=0.02m,周期T=0.5s,波长λ=100m,原点处质元初相位φ=0,则波动方程的表达式为()。 A: y=0.02cos2π[(t/2)-0.01x](SI) B: y=0.02cos2π(2t-0.01x)(SI) C: y=0.02cos2π[(t/2)-100x](SI) D: y=0.02cos2π(2t-100x)(SI)
- (zjcs10波形得物理量)一平面简谐波的波动方程为y=0.1cos(3πt-πx-π)(SI),t=0时的波形曲线如图所示,则()
- 【单选题】一平面简谐波,其振幅为 A ,频率为 n .波沿 x 轴 负 方向 传播.设 t = t 0 时刻波形如图所示.则 x = 0 处质点的振动方程为 A. y=Acos[2π n (t+t 0 )+π/2] B. y=Acos[2π n (t-t 0 )+π/2] C. y=Acos[2π n (t-t 0 )-π/2] D. y=Acos[2π n (t-t 0 )+π]
- 如下命令中不能实现如下微分方程组[img=327x203]17e443a5d83ce02.png[/img],在初值条件[img=172x112]17e443a5e2ead01.png[/img]下的特解求解的是: A: [x,y] = dsolve('Dx+5*x+y = exp(t)', 'Dy-x-3*y=0', 'x(0)=1', 'y(0)=0', 't') B: [x,y] = dsolve('Dx+5*x+y = exp(t)', 'Dy-x-3*y=0', 'x(0)=1, y(0)=0', 't') C: [x,y] = dsolve('Dx+5*x+y = exp(t)', 'Dy-x-3*y=0', 'x(0)=1', 'y(0)=0') D: [x,y] = dsolve('Dx+5*x+y = exp(t)', 'Dy-x-3*y=0', 'x(0)=1', 'y(0)=0', 'x')