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Recently Asked Questions

Q.
A person of mass M is standing on lift. If lift moves vertically upwards according to given v-t graph then find out the apparent weight of man at t = 1 sec. (g = 10m/s²)

Option: 1
20 M

Option: 2
10 M

Option: 3
5 M

Option: 4
15 M

Q.
A circular road of radius 30m has banking at an angle 45⁰. The maximum safe speed of car (in m/s ) having mass 1000kg will be, if the coefficent of friction between road and tyre is 0.5 [g = 10m/s²]
Option: 1
30

Option: 2
20

Option: 3
35

Option: 4
45

Q.
The hardness of a water sample containing $10^{-3}M$ $MgSO_{4}$ expressed as $CaCO_{3}$ equivalents (in ppm) is_____________.

(molar mass of $MgSO_{4}$ is 120.37 g/mol)

Option: 1
100ppm

Option: 2
200ppm

Option: 3
99.85ppm

Option: 4
111.5ppm

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