CSIR-NET JUNE 2018
106) If the depth of the Indian ocean averages
3900m, What would be th approximate forward speed of
a shallow wave
a)904 km/hr
b)704 km/hr
c)504km/hr
d)204km/hr
(Thanks to Suresh sir ANU)
(Thanks to Neeraja AU)
Sol:
The relation between Velocity or Speed , depth of a shallow wave is
$V=\sqrt{gd}------(1)$
g=9.8m/s
d=3900m
$V=\sqrt{9.8\times3900}=\sqrt{38220}$
V=195m/s
V=0.195km/s-----------(a)
$1hr=60\times60s$
1hr=3600s
$1s=\frac{1}{3600}hr----------(2)$
V=0.195km/s
$V=0.195km/s=\frac{1}{3600}hr$
$V=0.195\times3600km/hr=703.79km/hr$
V=704km/hr-----------(3)
Sir ,I got exact" 702"
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