For a student to qualify, he must pass at least two out of three exams. The probability that he will pass the 1st exam is p. If he fails in one of the exams, then the probability of his passing in the next exam is p/2, otherwise it remains the same. Find the probability that he will qualify?

Anonymous User Maths Probability 01 Nov, 2020 1 Answer 70 views

















A wave travelling along the x-axis is described by the equation y(x, t) = 0.005 cos (αx −βt). If the wavelength and the time period of the wave are 0.08 m and 2.0 s, respectively, then α and β in appropriate units are

Anonymous User Physics 28 Oct, 2020 1 Answer 64 views

Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross sectional area A = 10 cm2 and length = 20 cm. If one of the solenoids has 300 turns and the other 400 turns, their
mutual inductance is (μ0 = 4π × 10-7 Tm A-1)

Anonymous User Physics 28 Oct, 2020 1 Answer 76 views


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Mason Robert General Knowledge 23 Oct, 2020 1 Answer 66 views


A planet in a distant solar system is 10 times more massive than the earth and its radius is 10 times smaller. Given that the escape velocity from the earth is 11 kms−1, the escape velocity from the surface of the planet would be

Anonymous User Physics 21 Oct, 2020 1 Answer 60 views


























AB is a vertical pole with B at the ground level and A at the top. A man finds that the angle of elevation of the point A from a certain point C on the ground is 60°. He moves away from the pole along the line BC to a point D such that CD = 7 m. From D the angle of elevation of the point A is 45°. Then the height of the pole is?

Anonymous User Maths 12 Oct, 2020 1 Answer 72 views

Assume that a drop of liquid evaporates by decrease in its surface energy. So that its temperature remains unchanged. What should be the minimum radius of the drop for this to be possible? The surface tension is T, density of liquid is ρ and L is its latent heat of vaporization?

Anonymous User Physics 05 Oct, 2020 1 Answer 69 views