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denis-greek [22]
3 years ago
6

Are good conductors of heat also good conductors of electricity? Explain your answer.

Physics
2 answers:
Mumz [18]3 years ago
8 0

electricity is also hot so anything that conducts heat must be able to conduct  electricity as well

musickatia [10]3 years ago
7 0
Yes there are good conductors of heat and electricity, such as silver. silvers a good conductor of heat and electricity because it has thermal conduction or 430W mK. also copper good as well
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Recall the definition of the cross product with respect to the unit vectors:

i × i = j × j = k × k = 0

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and that the product is anticommutative, so that for any two vectors u and v, we have u × v = - (v × u). (This essentially takes care of part (b).)

Now, given a = 8i + j - 2k and b = 5i - 3j + k, we have

a × b = (8i + j - 2k) × (5i - 3j + k)

a × b = 40 (i × i) + 5 (j × i) - 10 (k × i)

… … … … - 24 (i × j) - 3 (j × j) + 6 (k × j)

… … … … + 8 (i × k) + (j × k) - 2 (k × k)

a × b = - 5 (i × j) - 10 (k × i) - 24 (i × j) - 6 (j × k) - 8 (k × i) + (j × k)

a × b = - 5k - 10j - 24k - 6i - 8j + i

a × b = -5i - 18j - 29k

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