MCQ
The working principle of rocket propulsion is conservation of:
- ✓linear momentum
- Bkinetic energy
- Cangular momentum
- Dmass
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(Given $\varepsilon_0=8.85 \times 10^{-12}\,C ^2 / Nm ^2$ )
$y_1=5 \sin 2 \pi(75 t-0.25 x)$
$y_2=10 \sin 2 \pi(150 t-0.50 x)$
The intensity ratio $\frac{I_1}{I_2}$ of the two waves is
