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What is density?
Density is a physical characteristic, and calculates of mass per unit of volume of a material or substance. It is a measurement of the quantity of matter in a given volume of something.
The higher an object's density, the higher it's mass per unit of volume. The average density of an object equivalent its total mass divided by its total volume. A denser object (like iron) will have less volume than an equal mass of some less dense substance (like water).
Explain internal or external forces Forces can be internal or external. For instance the mutual attraction of atoms within a block of wood are known as internal forces. Somethi
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A triode valve which is acting as an amplifier gives a voltage gain of 30. If anode resistance is 20 K ? for valve and load resistance is 60 K ?, what is value of amplification fac
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