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Physics
Atto is --------------
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Q. Atto is --------------
Physical World, Units and Measurements
A
An instrument used to measure gradient
9%
B
An instrument used to measure the altitude
0%
C
$10^{18}$ metre
27%
D
$10^{-18} $ metre
64%
Solution:
Correct answer is (d) $10^{-18} $ metre