Recent questions in Engineering Entrance Exams

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The mean of 6 numbers is 6.5 and its variance is 10.25. If 4 numbers are 2,4,5 and 7, then find the other two.

asked Aug 1, 2021 in 2021 by Doubtly (98.9k points)

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1 answer 1.1k views

The initial velocity vi required to project a body vertically upward from the surface of the earth to reach a height of 10R, where R is the radius of the earth,

asked Jul 24, 2021 in Physics by Doubtly (98.9k points)

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The radius in kilometer to which the present radius of earth (R = 6400 km)

asked Jul 24, 2021 in Physics by Doubtly (98.9k points)

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which of the following is most easily economically refined by fractional distillation

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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If P4O10 + HNO3 are mixed in 1:4 ratio , then nature of nitrogen oxide obtained will be

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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Benzene has vapor pressure of 70 torr and methyl benzene has 20 torr .

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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In △ABC , cos B= 3/5 , AB=5 and R=5 . find the area of △ABC

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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1 answer 927 views

find the coefficient of x^256 in [1-x]^101 x (x^2+x+1)^100

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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tangent and normal are drawn to y^2=2x at A(2,2). tangent cuts x-axix at T and normal cuts parabola again at P

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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1 answer 192 views

Bird is flying in northeast direction with v 4rt^2 wind from north to south with 1m/s find the

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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The period of oscillation of a simple pendulum is T = 2π\sqrt{Lg}. Measured value of 'L' is 1.0 m from meter

asked Jul 15, 2021 in Physics by Doubtly (98.9k points)

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1 answer 145 views

Crystals can be classified into _______ basic crystal units. (A) 3 (B) 7 (C) 14 (D) 4

asked Jun 19, 2021 in chemistry by Doubtly (98.9k points)

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Which of the following is a crystalline solid? (A) Glass (B) Rubber (C) Plastic (D) Sugar

asked Jun 19, 2021 in chemistry by Doubtly (98.9k points)

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1 answer 217 views

Amorphous solids are _______. (A) true solid substances (B) substances with ordered

asked Jun 19, 2021 in chemistry by Doubtly (98.9k points)

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Amorphous substances have _______. (i) definite heat of fusion (ii) only short range

asked Jun 19, 2021 in chemistry by Doubtly (98.9k points)

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Amorphous solids _______. (A) possess sharp melting points

asked Jun 19, 2021 in chemistry by Doubtly (98.9k points)

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A solid having irregular shape is called _______ solid

asked Jun 19, 2021 in chemistry by Doubtly (98.9k points)

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The ability of crystalline solids to change values of physical properties when measured in different directions is called _______.

asked Jun 19, 2021 in chemistry by Doubtly (98.9k points)

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1 answer 176 views

Graphite, diamond and fullerene are the polymorphic forms of _______.

asked Jun 19, 2021 in chemistry by Doubtly (98.9k points)

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1 answer 152 views

Which among the following solids is NOT soft?

asked Jun 19, 2021 in chemistry by Doubtly (98.9k points)

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