Chemistry Study notes for PSC Exams

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The 90th Academy Awards ceremony, presented by the Academy of Motion Picture Arts and Sciences (AMPAS), honored the best films of 2017 and took place at the Dolby Theatre in Hollywood, Los Angeles, California on 4 March 2018. Oscars 2018 - List of Winners is.

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Best Picture: The Shape of Water.
Actress in a Leading Role: Frances McDormand for Three Billboards outside Ebbing, Missouri.
Actor in a Leading Role: Gary Oldman for Darkest Hour.
Directing: Guillermo del Toro for The Shape of Water.
Adapted Screenplay: James Ivory for Call Me by Your Name.
Animated Feature Film: Lee Unkrich and Darla K. Anderson for Coco.
Animated Short Film: Kobe Bryant and Glen Keane for Dear Basketball.
Best Actor in a Supporting Role: Sam Rockwell for Three Billboards Outside Ebbing, Missouri.
Best Actress in a Supporting Role: Allison Janney for I, Tonya.
Cinematograp...

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Reforms and Events During British Period Cabinet Mission – Wavell.
Communal Award – Wellington.
Doctrine of Lapse – Dalhousie.
Dyarchy – Chelmsford.
First Census – Ripon.
INA Trial – Wavell.
Jallianwala Bagh Tragedy – Chelmsford.
Permanent Settlement – Cornwallis.
Quit India – Linlithgow.
Sepoy Mutiny – Canning.
Subsidiary Alliance – Wellesley.
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Important Maths Formulas .

(a ± b) 2 = a 2 ± 2ab + b 2 .


(a + b + c) 2 = a 2 + b 2 + c 2 + 2(ab + bc + ca).


(a + b + c + d) 2 = a 2 + b 2 + c 2 + d 2 + 2(ab + ac + ad + bc + bd + cd) .

a 2 ×a 1 = a 3 .

a 2 ÷a 1 = a 1 .

(a 2 ) 1 = a 2 .

a -2 / a 2 = 1.

(ab) 2 = a 2 xb 2 =ab 4 .

a 0 = 1.

a 1/2 = 2√a.

(√a) 2 = a.


Geometry formulas .

Perimeter ( ചുറ്റളവ് ) .


Perimeter of a square: P=4a.

    a: length of one side.


Perimeter of a rectangle: P=2(l+w).

    l: length.

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