A car is fitted with a convex side-view mirror of focal length 20cm. A second car 2.8 m behind the first car is overtaking the first car at relative speed of 15 m/s. The speed of the image of the second car as seen in the mirror of the first one is?

Anonymous User Physics Ray Optics 11 Nov, 2020 1 Answer 88 views

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 78 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 70 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 85 views

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Mason Robert General Knowledge 23 Oct, 2020 1 Answer 71 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 67 views