4/5 times of a number is 4 greater than 3/4 times of the same number. Then the number is Bissoy Answers

A coin is tossed 500 times and we get heads : 285 times and tails : 215 times When a coin is tossed at random , what is probability of getting (i) a h

Correct Answer - (i) 0.57 (ii) 0.43

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Two coins are tossed 400 times and we get two heads : 112 times, one head , 160 times , 0 head , 128 times . When two coins are tossed at random , wha

Correct Answer - (i) 0.28 (ii) 0.4 (iii) 0.32

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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 ∵ \(\tau\) \(= \frac{dL}{dt},\) \(F = \frac{dP}{dt}\) \(\left(\frac{dL}{dt}\right) = r \times \left(\frac{dP}{dt}\right)\) \(\left(\frac{dL}{dt}\right) - r \times \left(\frac{dP}{dt}\right) = 0\)

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Let \( \vec{a}, \vec{b}, \vec{c} \) be unit vectors such that \( \vec{a}+\vec{b}+\vec{c}=\overrightarrow{0} \). Which one of the following is correct ? [IIT-2007] (a) \( \vec{a} \times \vec{b}=\vec{b} \times \vec{c}=\vec{c} \times \vec{a}=\overrightarrow{0} \) (b) \( \overrightarrow{ a } \times \overrightarrow{ b }=\overrightarrow{ b } \times \overrightarrow{ c }=\overrightarrow{ c } \times \overrightarrow{ a } \neq \overrightarrow{0} \) (c) \( \overrightarrow{ a } \times \overrightarrow{ b }=\overrightarrow{ b } \times \overrightarrow{ c }=\overrightarrow{ a } \times \overrightarrow{ c } \neq \overrightarrow{0} \) (d) \( \vec{a} \times \vec{b}, \vec{b} \times \vec{c}, \vec{c} \times \vec{a} \) are mutually \( \perp \)

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Which of the following is a wrong statement ? A) Mass of proton was 1836 times greater than that of the electron

B) Proton is represented as P-

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Let ‘O’ be the centre of a circle. The distance of chord AB from O is greater than the distance of chord CD from ‘O’ then

Correct option is C) AB < CD

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The sum of two numbers is 29. If one number is 5 greater than the other, then the bigger number is

Correct option is (C) 17 The smaller number is x. \(\therefore\) other number is x+5. \((\because\) One number is 5 greater than the other) Given that sum of two numbers is 29. \(\therefore\) x + (x+5) = 29 \(\Rightarrow\) 2x...

2 Answers 1 views

The sum of two numbers is 29. If one number is 5 greater than the other, then the bigger number is 2 Answers 1 views

4/5 times of a number is 4 greater than 3/4 times of the same number. Then the number is

Correct option is D) 80

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Assertion `(A): beta-` particles have greater penetrating power than `alpha-` rays but less than `gamma-`rays. Reason `(R) : beta-` particles are ligh

Correct Answer - A Refer Section

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4/5 times of a number is 4 greater than 3/4 times of the same number. Then the number is

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