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Physics

Physics
Minimum number of unequal vectors which can give zero resultant are

more than four
four
two
three

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Physics
Hot water is poured simultaneously in four metallic tumblers painted outside with different points. After some time the water will be found to have cooled most in the tumbler painted.

Rough white
Shining white
Rough black
Shining black

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Physics
Megahertz is a measurement of

Wavelength
Speed
Capacity
Frequency

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Physics
When the main switch of the house is put off it disconnects the

Live wire and the neutral wire
Earth wire and the neutral wire
Live wire and the earth wire
Live wire only

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Physics
Hydraulic brakes in automobile work on

Bernoulli's principle
Poiseuille's principle
Archimedes' principle
Pascal's principle

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Physics
A ball is thrown vertically upward from the ground. It crosses a point at the height of 25 m twice at an interval of 4 seconds. The ball was thrown with the velocity of

36 m/s
25 m/s
18 m/s
30 m/s

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