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The southern kingdom of China was not left with any alternative path to reach the Silk Route because ____________ 

Monjur Alahi

The southern kingdom of China was not left with any alternative path to reach the Silk Route because ____________ 

(a) China was attacked by a foreign power 

(b) China disintegrated into three parts 

(c) they found a delta region 

(d) the Silk Route was infested with robbers


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Salim Ahmed Kawsar

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(c) they found a delta region

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Sodium gets dissolved in liquid ammonia because of ____________ .

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The ……………….. Ocean route is the most important and busiest ocean route in the world. 

(a) Atlantic

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Correct Answer is  (a) Tambapanni

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The southern kingdom was not left with any alternative path to reach the Silk Route.

When the rule of the Han dynasty ended, China disintegrated into three parts. Because of this disintegration, China was not left with any alternative path to reach the Silk Route.  Hence, the...

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9. (i) If \( A =\left[\begin{array}{rr}2 & -1 \\ -1 & 2\end{array}\right] \), verify \( A ^{2}-4 A +3 I = O \), where \( I =\left[\begin{array}{ll}1 & 0 \\ 0 & 1\end{array}\right] \) and \( O =\left[\begin{array}{ll}0 & 0 \\ 0 & 0\end{array}\right] . \) Hence find \( A ^{-1} \) (W. Bengal B. 2016 )

I want answer

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Rearing of silk worms for the production of silk is known as

(B) Sericulture

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4. The value of \( \left(\frac{1}{2}\right)^{-2}+\left(\frac{1}{3}\right)^{-2}+\left(\frac{1}{4}\right)^{-2} \) is (a) \( \frac{61}{144} \) (b) \( \frac{144}{61} \) (c) 29 (d) none of these

Correct answer is:- (c) 29 Explanation:-  1/2-2 + 1/3-2 + 1/4-2 = 22 + 32 + 42 (x-1 = 1/x) = 4 + 9 + 16  = 29 

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Consider a particle of mass \( m \) having linear momentum \( P \) at position \( r \) relative to the origin \( O \). Which of the following equations correctly relates \( r , P , L \) ? a) \( \left[\left(\frac{d L}{d t}\right)+r x\left(\frac{d P}{d t}\right)\right]=0 \) b) \( \left[\left(\frac{d L}{d t}\right)-r x\left(\frac{d P}{d t}\right)\right]=0 \) c) \( \left[\left(\frac{d L}{d t}\right) \times\left(\frac{d r}{d t}\right) \times P\right]=0 \) d) \( \left[\left(\frac{d L}{d t}\right)-\left(\frac{d r}{d t}\right) \times P\right]=0 \)

Correct answer is (b) We know that \(\tau\) = r × F ∵ \(\tau\) \(= \frac{dL}{dt},\) \(F = \frac{dP}{dt}\) \(\left(\frac{dL}{dt}\right) = r \times \left(\frac{dP}{dt}\right)\) \(\left(\frac{dL}{dt}\right) - r \times \left(\frac{dP}{dt}\right) = 0\)

2 Answers 1 views

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