Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Physics Waves Wavelength and Frequency
A boat at anchor is rocked by waves whose crests are 120 m apart and velocity is 20 ms-1. The boat bounces up once in every:
1
1/6 sec
2
3 sec
3
6 sec
4
More than one of the above
5
None of the above