physics multiplying vectors

n the product F = qv · B , take q = 4,
= 2.0i + 4.0j + 6.0k and = 136i -176j + 72k.
What then is in unit-vector notation if Bx = By?

~~may i get some assistance in this problem? so far.. i tried this..

136i-176j+72k = 4(2.0i+4.0j+6.0k)(B)
136i-176j+72k = (8i+16j+24k)(B)
[(136i-176j+72k)/(8i+16j+24k)] = B
17i-11j+3k = B

thats wrong.. so should i be doing this?
136i-176j+72k = (8xi+16yj+24zk)(Bxi+Byj+Bzk)
136i-176j+72k = (8xBxi+16yByj+24zBzk)

i need some help asap, that would be great. thanks again!

For Further Reading

* physics multiplying vectors - drwls, Thursday, March 29, 2007 at 4:37pm

Fill in the blanks in your question
<< In the product F = qv · B , take q = 4,
___= 2.0i + 4.0j + 6.0k and ___= 136i -176j + 72k.
What then is ___ in unit-vector notation if Bx = By>>
If the B vector is 2.0i + 4.0j + 6.0k, then Bx and By are NOT equal. Your question is incomplete and does not make sense.

* physics multiplying vectors - bobpursley, Thursday, March 29, 2007 at 4:38pm

You didn't multiply...

136i-176j+72k = (8i+16j+24k)(B)
But B= Bxi +Byj + Bzk
136i-176j+72k = (8i+16j+24k)(Bxi +Byj + Bzk)
136i-176j+72k= 8Bx k -8By j + 16Bx k +16Bz i + 24Bx j- 24By i

Now gather the terms, set the i terms equal to i, and so on. Check my work, I did it in my head.

* physics multiplying vectors - sam, Thursday, March 29, 2007 at 9:37pm

sorry, the complete question is:

n the product F = qv · B , take q = 4,
v = 2.0i + 4.0j + 6.0k and F= 136i -176j + 72k.
What then is in unit-vector notation if Bx = By?

I still can't get the right answer though... this step:
136i-176j+72k = (8i+16j+24k)x(Bxi+Byj+bzk) I didn't think that you could just multiply the two vectors on the right hand side since they are both vectors not scalars. I have 3 vectors and I am trying to solve for B. How do I do that after this step?

thanks, i figured it out.

  1. 👍
  2. 👎
  3. 👁

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    Given the reaction: Cu2+(aq) + S2-(aq) CuS(s) What will happen (a) if CuSO4(aq) is added? And (b) if Na2SO4(aq) is added? A. (a) Nothing; (b) Less product will form B. (a) Less product will form; (b) Nothing C. (a) Nothing; (b)


    When 10.8 g of Silver was reacted with Sulfur, 12.4 grams of product was produced (there was only one product). What is the empirical formula of the product?


    The cost to produce a product is modeled by the function f(x) = 5x^2 − 70x + 258 where x is the number of products produced. Complete the square to determine the minimum cost of producing this product. 5(x − 7)^2 + 13; The

  4. math

    check my answers 1. -23 x 5 my answer is -115 2. -8 x 15 my answer is -120 3. 75 x 6 my answer is 450 4. 12 x -7 my answer is -84 5. -24 x -20 my answer is 480 6. -130 x 7 my answer is -910 7. which has a product of 170 my answer

  1. math

    which of the following are reasonable answer for the product of two negatives and a positive a. 20** b. 10 c. -20 d. -10 Which statement about the product is true 5.5⋅√5 a. The product is rational b. The product is

  2. Algebra 2

    What is the product of a complex conjugated? The product of complex conjugates is a difference of two squares it is always a real number. The product a complex conjugates may be written in standard form as a + bi where neither a

  3. Macroeconomic

    Suppose that a market for a product is in equilibrium at a price of $5 per unit. At any price above $5 per unit. A. There will be an excess demand for the product. B. There will be an excess supply of the product. C. The quantity

  4. algebra

    1.If a number a is always less than another number b, which of the following expressions expresses their relationship? A.a≤b B.a≥b C.a>b D.a0 D.x9 Which of the following sentences is the word equivalent of the expression

  1. Math

    There are 4 odd functions and 3 even functions in the gallery of the 12 basic functions. After multiplying these functions together pairwise in different combinations and exploring their graphs, make a conjecture about the

  2. maths

    the sum of N positive integers is 19. what is the maximum possible product of these N numbers? thx. Nice problem. Let's look at some cases 1. N=2 clearly our only logical choices are 9,10 for a product of 90 It should be obvious

  3. Algebra

    Which statement about the product is true? 5.5 Square Root 5 A)The product is rational. B)The product is irrational. C)The product is neither rational nor irrational. D)There is not enough information provided to answer the

  4. math

    Find the product of √30 and 6√10. Express it in standard form (i.e., a√b. Enter the product of the coefficients followed by the product of the numbers under the square roots separated by a comma. How I solve for it 1*30=30

You can view more similar questions or ask a new question.