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an electric geyser per hour of its use .it is designed to work on the mains voltage 220v.

1.does the resistance of this device remain constant during its operation/working?

2.which of the two 100W,220V night lamps has higher resistance

1.does the resistance of this device remain constant during its operation/working?

2.which of the two 100W,220V night lamps has higher resistance

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A man is travelling in a straight field.After 10m he makes a 60 degree turn to his left.After 8 such turns what will be his total displacement?

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1. Sand falls at the rate of 0.15kg/s on a conveyor belt moving horizontally at a constant speed of 2 m/s , calculate i) the extra force necessary to maintain this speed ii) the rate at which work is done by this force, iii) the change in kinetic energy per second of the sand on the belt. Account for the difference between answer to (ii) to (iii)

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How does de-Broglie postulate enter into the Schroedinger theory?

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the sum of three vectors gives a zero resultant.What can be the orientation of a vector

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good morning please tell

if v and u are two vectors and r is their resultant and r is perpendicular to v and 1/2 of u then what is angle between v and u

if v and u are two vectors and r is their resultant and r is perpendicular to v and 1/2 of u then what is angle between v and u

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a plane flying horizontally at 100 m/s at a height of 1000 m releases a bomb. find

i) the time taken to reach the ground.

ii) the distance of the target

i) the time taken to reach the ground.

ii) the distance of the target

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A ball is thrown with a velocity of 7 root 2 m/s at an angle of 45 degree with the horizontal. It just clears two vertical poles of height 90 cm. Find the separation between the poles. Take g =9.8

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How to determine the distance of diffrent stars from the earth?

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A lightning bolt may carry a current of 1.00 × 10power5 A for short period of time. Find the magnetic field 50 m from the bolt. Assume that the bolt extends far above and below the point of observation.

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