Physics
What is the full form of "RADAR" ?

Radio Device and Ranging
Radio Detect and Rangs
Region Device and Ranging
Radio Detecting and Ranging

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Physics
The nature of fuse wire is

Low resistance and high melting point.
High resistance and low melting point.
High resistance and high melting point.
Low resistance and low melting point.

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Physics
Siphon will fail to work if:

The densities of the liquid in the two vessels are equal.
The temperature of the liquids in the two vessels are the same.
Both its limbs are of unequal length.
The level of the liquid in the two vessels are at the same height.

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