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problem 1:

Two identical vessels of dissimilar materials are filled with quantity of ice. In one of them ice liquefies in 40 minutes and in other in the 70 minutes. Compute the ratio of thermal conductivities of the materials?

problem 2:

Critically discuss the phenomena which produce the colours in soap bubble.

problem 3:

Compute the specific rotation if plane of polarization is turned through 26.4oC, traversing 20 cm length of the 20% sugar solution.

problem 4:

Illustrate out the term SONAR. In brief illustrate how ultrasonic waves are employed in SONAR.

problem 5:

Verify the Change of percentage of the earth’s mass when its radius is diminished by 1%.

problem 6:

Illustrate out the type of the strain when the spiral spring is stretched by the weight attached to it.

problem 7:

Why diffraction of the X-rays is not probable with the ordinary grating?

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