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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
what is alternating current
The specific resistance of copper is 1.7ohm. find the resistance of copper wire of length 10m and diameter 1mm. solution) R=ρ*l/A so ou have ρ,l and r(radius). you can use the f
graph
Which statement concerning the electric potential of a solid object made out of a perfectly conducting medium is most correct? Answer: It is the electric field which is z
Q. Collector current I c =20 mA and base current I b = 50 A. Find current gain β of a transistor. β = I C / I B = 20 X 10 -3 / 50 X 10 -6 = 400
Which of the following are isoelectronic with one another: (1)Na + ans Ne (2)K + ans O (3)Ne ans O (4)Na + ans K + Ans: Na + ans Ne
after formation of bond where does electron rotate
basic informations about nicol prism
Magnetism - Basic concepts: 1. Pole strength: The ability of a pole of a magnet to attract or repel another magnetic pole is called its pole strength. Units : A-m 2.
A tortoise can run with a speed of 0.12 m/s, and a hare can run 20 times as fast. In a race, they both start at the same time, but the hare stops to rest for 4.0 minutes. The torto
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