Physics
A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be

5 R/4
R/5
5 R
4 R/5

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Physics
Kinetic energy depends on

The pressure of the moving body
The mass of the moving body
Both mass and velocity of the moving body
The velocity or speed of the moving body.

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