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Evasluate (25.2xx1374)/33.3. All the dig...

Evasluate `(25.2xx1374)/33.3. All the digits in this expression are significant.

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We have `(25.2xx1374)/33.3 = 1039.7838.`
Out of the three numbers given in the expression 25.2 and 33.3 have 3 significant digits and 1374 has our. The answer shold have three significnt digits. Rounding 1039-7838. to three significant digits, it becomes 1040. Thus, we write
`(25.2xx1374)/33.3 = 1040`
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HC VERMA-PHYSICS AND MATHEMATICS-Exercises
  1. Evasluate (25.2xx1374)/33.3. All the digits in this expression are sig...

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  2. A vector vecA makes an angle of 20^@ and vecB makes an angle of vec11...

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  3. Let vecA and vecB be the two vectors of magnitude 10 unit each. If the...

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  4. Add vectors vecA,vecB and vecC each having magnitude of 100 unit and i...

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  5. Let veca=4veci+3vecj and vecb=3veci+4vecj. a.Find the magnitudes of a....

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  6. Refer to figure Find a the magnitude, b x and y components and c. the ...

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  7. Two vectors have magnitudes 3 unit and 4 unit respectively. What shoul...

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  8. A spy report about a suspected car reads as follows. The car moved 2.0...

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  9. A carrom board 4ftxx4ft square) has the queen at the centre. The queen...

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  10. A mosquito net over a 7ftxx4ft bed is 3 ft high. The net hs a hole at ...

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  11. Suppose veca is a vector of magnitude 4.5 unit due north. What is the ...

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  12. Two vectors have magnitudes 2 m and 3m. The angle between them is 60^0...

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  13. Let A1 A2 A3 A4 A5 A6 A1 be a regular hexagon. Write the x-components ...

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  14. Let veca=2veci+3vecj+4veck and vecb=3veci+4vecj+5veck. Find the angle ...

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  15. Prove that vecA.(vecAxxvecB)=0

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  16. If vecA=2veci+3vecj+4veck and vecB=4veci+3vecj+2veck, find vecAxxvecB.

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  17. If vecA,vecB,vecC are mutually perpendicular show that vecCxx(vecAxxve...

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  18. A particle moves on a given straight line with a constant speed v. At ...

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  19. The force on as charged particle due to electric and magnetic fields i...

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  20. Give an example for which vecA.vecB=vecC.vecB but vecA!=vecC.

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  21. A curve is represented by y=sinx. If x is changed from pi/3 to pi/3+pi...

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