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Multiple choice: The horizontal distance x and the vertical height y of a projectile at time t are given by
x = at and y = bt² + ct.
where a, b and c are constants. Then;

The speed of the projectile 1 second after it is fired is
The angle with the horizontal at which the projectile is fired is
The acceleration due to gravity is -2b
The initial speed of the projectile is

Chemistry

On adding few drops of dil. HCl or FeCl₃ to freshly precipitated ferric hydroxide, a red coloured colloidal solution is obtained. This phenomenon is known as:
(a) Peptization (b) Dialysis (c) Protection (d) Dissoluton

Mathematics

The real value of 'a' for which the sum of the squares of the roots of the equation
assume the least value is

(a) 0 (b) 1 (c) 2 (d) 3

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