Physics
Find the resistance (in mega) of a wire of length 20m, cross sectional area 1 cm2 and made of a material of resistivity 200m.

4000
2000
40
80

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Physics
Air moves from the region where the air ________

Humidity is low to the region where the humidity is high
Humidity is high to the region where the humidity is low
Pressure is low to the region where the pressure is high
Pressure is high to the region where the pressure is low

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