# 3 - Dimensional Analysis Questions Answers

rain is falling down vertically 2m/s. a person is walking with velocity 2m/s on horizantal road. the angle made by the umbrella with vertical to protect from rain is

**Asked By: VISHISTA**

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IF 2sin^{2}22^{0} = p+qcosθ, FIND SMALLEST POSITIVE VALUE OF θ, WHEN p=1 AND q = -1.

**Asked By: SARIKA SHARMA**

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2sin^{2}22.5 = 1- cos45 = 1 + (-1)cos45

so θ = 45

what is the formula for hole mobility in a semiconductor. ( not dimensional formula ,that i will find myself)

**Asked By: SARIKA SHARMA**

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hole mobility = velocity of hole/electric field applied