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Q. What are secondary cells? Give an example?
i) They are rechargeable.
ii) The chemical reactions which take place in secondary cells are reversible.
iii) The active materials which are used up when the cell delivers current can be reproduced by passing current through the cell in opposite direction. Instance lead acid accumulator and alkali accumulator.
Elasticity is defined as the ability of a solid to return to its original shape even after being expanded or contracted. Elasticity is termed as the property of a solid to return t
What is time? 1. This is the question that each true scientist dreads to be asked especially in a public setting by extremely inquisitive young learners. We have learned to ca
Question: Resultant of two forces P & Q is R. If Q is doubled R is doubled while if Q is reversed R is again doubled. Show that P:Q:R=(2) 1/2 :(3) 1/2 :(2) 1/2 .
Explain the Natural Frequencies and Resonance Standing waves occur when the waves, like those in a vibrating piece of rope, are repeating so that there are places on the rope t
Which of the following isn't true of an electric field? Answer An electric field can as well as does exist in vacuum. Except for the one about vacuum the entire the answe
Q. Explain what is free fall acceleration? Answer:- On earth free drop acceleration is 9.81 meters per second per second or 32.2 feet per second per second not including a
Ques: Point out the direction of the current if any induced to flow in the loop by the changing magnetic field. (Describe is the loop as viewed from above.) Answer:
Derive the mathematical equation for the couple acting on a bar magnet in a uniform magnetic field and thus deduce the definition of magnetic moment?
A substance has constant heat capacity C P = 3.5R and its equation of state is given by: P (V-cRT) = RT where c = 5 * 10 -7 m 3 /J. This substance is isentropically compre
A dartboard with a mass of 2.20 kg is suspended from the ceiling such that it is initially at rest. A 0.030-kg dart is thrown at the dartboard with a velocity of 1.3 m/s. A
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