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Valentin [98]
3 years ago
6

All chordates are vertebrates? A. True B. False

Physics
2 answers:
tatyana61 [14]3 years ago
8 0
All vertebrates<span> are </span>chordates<span> but </span>all chordates are not vertebrates.....So its false...an example is a lancelet...Please mark me brainliest

makvit [3.9K]3 years ago
3 0
This is true chordates are vertebrae
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An investigator places a sample 1.0 cm from a wire carrying a large current; the strength of the magnetic field has a particular
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Answer:

she must increase the current by factor of 7

Explanation:

The magnetic field produced by a steady current flowing in a very long straight wire encircles the wire.In order to solve the question, we use this formula,

B= μo I/(2πr)

where,

'μo'  represents permeability of free space i.e 4π*10-7 N/A2

B=magnetic field

I= current

r=radius

->When r= 1cm=> 0.01m

B1 = μo I_{1/(2π x 0.01)

->when r=7cm =>0.07m

B2 = μo I_{2}/(2π x 0.07)

Now equating both of the magnetic fields, we have

B1= B2

μo I_{1/(2π x 0.01)= μo I_{2}/(2π x 0.07)

I_{1/  I_{2}= 0.01/0.07

I_{1/  I_{2}= 1/ 7

Therefore, she must increase the current by factor of 7

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