good one

JEE Main 2015 Preparation › Optics questions › good one

An engineer wants to locate a water pipe buried about half a meter below the surface of the field. Of the following , which sort of radioactive isotope(emitter) , he shall add to the water?

a) Î³ emitter of T_1/2 of several days
b) Î² emitter of T_1/2 of several years
c) Î³ emitter of T_1/2 of few hours
d) Î±(alpha) emitter of T_1/2 of several years

#Physics #Optics

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5 Answers

11

pawanseerwani seerwani ·2009-03-23 04:21:50

i believe the ans is c is it the one?

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11

Subash ·2009-03-23 04:36:17

? explain please!

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33

Abhishek Priyam ·2009-03-23 04:42:31

because he wants it quick so less T_1/2

also Î³ can easily come to surface..

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11

Subash ·2009-03-23 04:47:41

thanks :D

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1

voldy ·2009-03-23 04:47:44

and contamination also should be take into account no ?

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Your Answer

Basic Integral Calculus Operators Symbols Matrix Cases

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° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω