Related Questions

If ‘Hs’ is the significant wave height, then the average wave height and highest wave height respectively are given by
A 0.6 Hs and 1.67 Hs
B 0.6 Hs and 1.87 Hs
C 1.27 Hs and 1.87 Hs
D 1.27 Hs and 1.67 Hs
In a new production process, the number of units produced during the first week was 450. If the efficiency gradually increase so that 10 additional units can be produced each week, how many will be produced in the 10th week?
A 490
B 700
C 540
D 640
Cretinism is due to the disorder of the ______ gland.
A Thymus
B Parathyroid
C Thyroid
D Adrenal
A person travels I2 km due north, then 15 km due east after that I5km due west and then 18 km due south. How far B she from the starting point?
A 6km
B 10km
C 33km
D 60km
The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight
A Of same magnitude as that of bar and applied at the lower end
B Half the weight of bar applied at lower end
C Half of the square of weight of bar applied at lower end
D One fourth of weight of bar applied at lower end
When a wave is incident from the more dense into a less dense medium at an angle equal to or exceeding the critical angle, the wave suffers total internal __________ .
A Reflection
B Refraction
C Transmission
D None of the above
The wave in wave guide has
A Group velocity inversely proportional to wavelength
B Larger frequency than in the free space
C Diminishing wavelength than in the free space
D Larger wavelength than in the free space
"An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media". This phenomenon is known as:
A Fresnel reflection
B Fresnel refraction
C Snell's law
D None of these
The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called:
A Sensors
B Passive sensors
C Active sensors
D None of these
For wave action in dams, the maximum height of freeboard is generally taken to be equal to (where hw is height of wave.)
A 0.5 hw
B 0.75 hw
C 1.25 hw
D 1.50 hw

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