Related Questions

As compared to wall type breakwater, mound type breakwater
A Requires skilled labor
B Requires low maintenance cost
C Requires less material
D Results in less damage due to gradual failure
The surface of a certain planet reflects 80 percent of the light that strikes it. The clouds around the planet then absorb 40 percent of the reflected light. What percent of the light that strikes the planet is reflected from the surface and passes through the clouds without being absorbed?
A 32%
B 40%
C 48%
D 60%
Pick up the correct statement from the following. A rubber ball when strikes a wall rebounds but a lead ball of same mass and velocity when strikes the same wall, falls down
A Rubber and lead balls undergo equal changes in momentum
B Change in momentum suffered by lead ball is less that of rubber ball
C Momentum of rubber ball is less than that of lead ball
D None of these
"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
A ladder is resting against a vertical wall and its bottom is 2.5 m away from the wall. If it slips 0.8 m down the wall, then its bottom will move away from the wall by 1.4 m. What is the length of the ladder?
A 6.2 m
B 6.5 m
C 6.8 m
D \7.5 m
If H is the height of the wave expected, then the height of the breakwater is generally taken as
A 1.2 H to 1.25 H above the datum
B 1.2 H to 1.25 H above the low water level
C 1.2 H to 1.25 H above the high water level
D 1.2 H to 1.25 H above the mean sea level
Overmodulation (amplitude) occurs when signal amplitude is ___________ carrier amplitude
A Equal to
B Greater than
C Less than
D None of the above
A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:
A Both the balls undergo an equal change in momentum
B The change in momentum suffered by rubber ball is more than the lead ball
C The change in momentum suffered by rubber ball is less than the lead ball
D None of the above
A glass ball is shot to hit a wall from a point on a smooth floor. If the ball returns back to the point of projection in twice the time taken in reaching the wall, the coefficient of restitution between the glass ball and the wall is
A 0.25
B 0.33
C 0.40
D 0.50
A painter has painted one-third of a rectangular wall which is ten feet high. When he will paint another 75 square feet of that wall, he will have finished three-quarters of the job. What is the length (the horizontal dimension) of the wall?
A 18 feet
B 12 feet
C 10 feet
D 9 feet

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