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3 years ago

9

The bubonic plague of the fourteenth century reduced England’s human population by _____. A. one-half B. one-tenth C. one-fourth

D. one-third

2 answers:

Tema [17]3 years ago

8 0

I'm pretty sure the answer is d. one-third

earnstyle [38]3 years ago

6 0

The answer is A. One-half

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Answer:

Angle between the forces $= 82.82$ degrees

Explanation:

The resultant force value $= 1.5$ times of Force F

$|R| = |F1| = |F2| =|F|$

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$R^2 = A^2 + B^2 + 2AB cos X\\(1.5F)^2 = F^2 + F^2 + 2F^2 cos X\\2.25F^2 = 2F^2 + 2F^2 cos X\\$

Cos X is the angle between the two forces.

On further simplifying the equation we get

$2.25F^2 = 2F^2(1 + cos X)$

$(1 + cos X) = \frac{2.25F^2}{2F^2} \\(1 + cos X) = \frac{2.25}{2} \\(1 + cos X) = 1.125\\cos X = 1.125 - 1\\Cos X = 0.125\\X = Cos^{-1}0.125\\$

$X = 82.82$ degrees

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