Question

QUIZ TIME
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Q.1 there is an elevator moving up, and u measure ur weight in weighing machine inside the lift, will the weighing machine show the correct weight, if not, will it show more weight or less, justify
Q.2 if x= 1/(2- root3), find (x+1/x)^2
Q.3 what is buoyant force?
Q.4 if x^2+ 7x+ 12=0, find x

Answer 1

Answer:

here is ur 2nd & 4th answer

Explanation:

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Answer 2

1) it show more weight because it is moving opposite to the gravity

2)
$2) \: \: \: x = \frac{1}{2 - \sqrt{3} } \\ so \: \frac{1}{x} = \frac{1}{2 + \sqrt{3} } \\ so \: \: \: \: x + \frac{1}{x} = \frac{1}{2 - \sqrt{3} } + \frac{1}{2 + \sqrt{3} } \\ = \frac{1}{2} + \frac{1}{2} \\ = \frac{2}{4}$
3) the which is exerted in water when a body is floating on its surface

4)
${x}^{2} + 7x + 12 = 0 \\ {x}^{2} + (4 + 3) x + 12 = 0 \\ {x}^{2} + 4x + 3x + 12 = 0 \\ x(x + 4) + 3( x + 4) = 0 \\ (x + 4)(x + 3) = 0 \\ so \: \: x = - 4 \: and \: - 3$
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