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Which of the following expressions are meaningful? ` vec udot( vec vxx vec w)` b. `( vec udot vec v)dot vec w` c. `( vec udot vec v)dot vec w` d. ` vec uxx( vec vdot vec w)`

A

`vecu.(vecvxx vecw)`

B

`(vecu.vecv).vecw`

C

`(vecu.vecv)vecw`

D

`vecu xx (vecv . Vecw)`

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The correct Answer is:
a,c
Dot product of two vectors gives a scalar quantity.
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CENGAGE-DIFFERENT PRODUCTS OF VECTORS AND THEIR GEOMETRICAL APPLICATIONS -Exercise
  1. Let veca=hati + hatj +hatk,vecb=hati- hatj + hatk and vecc= hati-hatj...

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  2. Let bar(PR)=3hati+hatj-2hatk and bar(SQ)=hati-3hatj-4hatk determine d...

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  3. Let veca=a(1)hati+a(2)hatj+a(3)hatk, vecb=b(1)hati+b(2)hatj+b(3)hatk a...

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  4. The number of vectors of unit length perpendicular to vectors vec ...

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  5. Let veca=2hati=hatj+hatk, vecb=hati+2hatj-hatk and vecc=hati+hatj-2hat...

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  6. For three vectors vecu,vecv,vecw which of the following expressions is...

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  7. Which of the following expressions are meaningful? vec udot( vec v...

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  8. If veca and vecb are two non collinear vectors and vecuveca0(veca.vecb...

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  9. Vector 1/3 (2hati - 2hatj +hatk) is

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  10. Let vec a be vector parallel to line of intersection of planes P1 and...

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  11. The vectors which is/are coplanar with vectors hati+hatj+2hatk and hat...

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  12. Let vecx, vecy and vecz be three vectors each of magnitude sqrt2 and t...

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  13. Let tianglePQR be a triangle . Let veca=overline(QR),vecb = overline(R...

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  17. If veca and vecb are vectors in space given by veca=(hati-23hatj)/(sqr...

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  18. Let veca=-hati-hatk,vecb =-hati + hatj and vecc = i + 2hatj + 3hatk be...

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  19. If veca, vecb and vecc are unit vectors satisfying |veca-vecb|^(2)+|ve...

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  20. Let vec a, vec b, and vec c be three non coplanar unit vectors such th...

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