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Simple 'spring' balance
Punch four holes in an old tin lid with a nail, spacing them partially round the circumference. Pass pieces of string by these holes and tie them together. Now join this scale.
If weights are not available, it is possible to graduate the balance using known volumes of water poured from a calculating jar and by making marks on the supporting stick conflicting the edge of the pan. Stones canthen be found which will give the similar extension and these should be marked for future use as weights. The use of coins for this purpose should also be investigated.
A lever of the second class Use a uniform wooden bar about 1 m long, 4 cm wide and 5 mm thick. Drill a hole near single end, in the centre of the width dimension. Also drill a
What is an illuminator? An illuminator, light generator or source is a box along with a lamp inside, pointing in the direction of an opening where fiber optics is secured. Obvi
What are synthetic rubbers? Give the preparation and structure of any two synthetic rubbers.
Unpolarized light: In ordinary light (light from sun, bulb etc.) the electric field vectors are given in all directions in a light is known as unpolarized light. The oscillation o
Define the Critical Angle and Fiber Optics When light is traveling in an optically dense medium, like water, and comes to the boundary of a less dense medium, like air, there a
Is negative mass antimatter? No. There is really no such thing as negative mass. Even antimatter has mass, which is always a positive (that is, greater-than-zero) quantity.
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(i)Most of the alpha-particles pass by the foil straight away undeflected. (ii)Some of them are deflected by small angles. (iii)A few alpha-particles (1 in 1000) are deflecte
determine the magnitude of Poynting vector end the energy per unit time delivered to a wire of length land cross section A when electric current I flow in it
Illustrate "Tangent law" in magnetism. Compare magnetic moment of two bar magnet in a tan A, tan B position by null method or equal distance method.
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