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Properties of cement mortar
1. It should make good adhesion with building units like bricks, stones etc.
2. It should be capable of resisting penetration of water.
3. It should be cost effective.
4. It should be durable
5. It should be simply workable
6. It should be inert with other materials in contact
7. It should be capable of developing designed stresses
8. It should be set speedily to achieve speed in construction
9. The mortar joints should be strong and should not make cracks
Q. Illustrate what is dissimilar between secondary electron image and back scattered electron image? Answer:- Secondary electron images demonstrate topography of a sample.
Superfluidity: The phenomena through which, at sufficiently low temperatures, a fluid can flow along zero viscosity. Its causes are related with superconductivity.
Q. A 4.5cm needle is placed 12cm away from a convex mirror of focal length 15cm. Give the location of the image and the magnification. Describe what happens as the needle is moved
What is proton-neutron hypothesis? Explain it?
Point out the direction of the current if any induced to flow in the coil by the changing magnetic field. (Depicted is a view of the coil from the side. Toward the top of the displ
a pendulum is timed ,first for 20 swings and then for 50 swings ; time for 20 swings = 17.4 sec and time for 50 sec = 43.2. calculate the average time per swing/
Construction of UJT The fundamental structure of a UJT is illustrated in fig. (a). It comprises an n-type silicon bar that is lightly doped. Two end connections are taken fr
how to find ratio of magnetic dipole moment of bar magnet
Why rotation of rigid bodies through finite angles not a vector? Ans) Because it does not obey one of the laws of vector algebra(law of commutativity).
experiments on how sound waves travel faster in iron
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