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Physics

A force

(where is a positive constant) acts on a particle moving in the xy plane. Starting from the origin, the particle is taken along the positive x axis to the point(a,O), and then parallel to the y axis to the point (a,a). The total work done by force F on the particle is

(a)

-2Ka²

(b)

2Ka²

(c)

-Ka²

(d)

Ka²

Chemistry

Complete and balance the following reactions.
(i) ₉₂Th²³⁴

................. + 7 ₂He⁴ + 6_-1

⁰

(ii)₉₂U²³⁵ + ₀n¹

...............+ ₅₂Te¹³⁷ + ₄₀Zr⁹²

(iii)₃₄Se⁸⁶

2 _-1e⁰ + .................

Mathematics

If

, where n is nonzero real number, then a is equal to

(a)

0

(b)

(c)

n

(d)

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