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Demonstrating the cause of the phases of the moon
Place a lighted candle or electric lamp on a table in a darkened room. Paint an 8 cm rubber ball white. Hold the ball in your hand at arm's length with your back to the light. Raise the ball sufficient above your head to permit the light to strike the ball. Note the part of the ball illuminated by the candle.
Resistance: Resistance is the opposition to the motion of electrons. This arises as a result of collision of moving electrons. The unit of resistance is "ohm" represented by
Thermistors Insulators and semi-conductors behave in a different way when the temperature increases, because their resistivity decreases. That is: the resistance of an insulato
what is the force of friction on a 5 kg box slides on a horizontal plane when its speed decreases 1.5ms-1 in a second?
The phenomenon of decomposition of electrolyte solution into ions on passing the current by it is called electrolysis. Practical functions of electrolysis are Electrotyping, ext
A small bulb is placed at the bottom of a tank containing water to a depth of 80 cm. What is the area of the surface of water through which light from the bulb can emerge out? Refr
what are the structure of the seeds
It is described by de-Broglie a moving material molecule sometimes acts as a wave and sometimes as a particle. The wave associated with moving particle is known as matter w
Ans) In the first one..... F=ma...the only force which acts is F...which causes an acc. of ''a'' to the body of mass m... and as the force=>F=ma but on the second... let .
What is the difference between unit cell and primitive cell In primitive cell, number of atoms per unit cell is one while if number of atoms per unit cell is greater than one i
Two blocks are tied together by a horizontal string and pulled a distance of 2.7 m across an air hockey table with a constant force of 35 N. The force is directed at an upward angl
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