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What is the hardness of water? How is it expressed?
Hardness is the property of water which stops lather formation with soap. This is because of the presence of certain salts of calcium, magnesium and other heavy metals dissolved in water, mainly because of the dissolved impurities like bicarbonates, chlorides and sulphates of calcium and magnesium.
how to make a ray diagram ?? and what are f, p ?? and what is refraction index?????
What is the position vector of point c in equilateral triangle?
Object A attracts object B with a gravatational force of 10 newtons from a given distance. If the distance between the two objects is doubled, what is the changed force of attracti
Can the batteries used in the torch lights be recharged after their discharge? Give reason? Ans) No,because the NH4Cl corrods the zn containger gradually.so with out anode redox
Explain New Terms for Describing Motion As mentioned in the last chapter, the mass of a cannonball is a measure of the amount of matter (in kilograms) that would balance agains
A river is flowing 4.0 m/s to the east. A boater on the south shore plans to reach a dock on the north shore 30.0° downriver by heading directly across the river. a. What shoul
Who was the first person to show that all objects fall toward Earth with constant _________.
Noise: An undesirable and unpleasant sound that makes harmful effects on our auditory system is known as noise.
describe the construction and working of a Nicol prism.discuss how you obtain a plane polarised beam with it?
Inertia with a spade Scoop up a spadeful of dry earth. Now pitch the earth away from you. View that when the spade stops the earth flies on due to inertia.
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