Engineering Mathematics Give the family of orthogonal trajectories of 5y = C / x

Question

Engineering Mathematics

Give the family of orthogonal trajectories of 5y = C / x3 -1 / 3 x2 + 5y2 = C x2 - 3y2 = C 5x2 - 3y2 = C 1 / 5 x2 + 3y2 = C x2 + 5y2 = C None of the above A calculator is required to obtain the final answer on this question. A solid metal sphere at room temperature 20 degree C is dropped into a container of boiling water (100 degree C). If the temperature of the sphere increases 5 degree in 9 seconds, find the temperature of the ball after 18 seconds in the boiling water. (Assume the sphere obeys Newton's Law of Cooling.) 29.68750000 degree

Explanation / Answer

correct answer is b

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