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Dafna11 [192]
3 years ago
7

What is the wavelength of an earthquake wave if it has a speed of 12 km/s and a frequency of 15 Hz

Physics
1 answer:
professor190 [17]3 years ago
3 0
First change km/ s into m/s, then use the formula
Lambda = velocity/ frequency
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A long solenoid, of radius a, is driven by an alternating current, so that the field inside is sinusoidal: B(t) = B0 cos(ωt) ˆz.
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Answer:

Explanation:

Given that,

B(t) = B0 cos(ωt) • k

Radius r = a

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Magnetic flux is given as

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And the Area is given as

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A = πa²/4

Then,

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Then, the EMF is given as

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From ohms law,

ε = iR

Then, i = ε/R

I(t) = ¼ωπa²Bo•Sin(ωt) /R

This is the current induced in the loop.

Check attachment for better understanding

7 0
3 years ago
Explain the difference between si base units and derived units. give an example of each
34kurt
Base SI unit is the unit that used for simple quantity like time=second and length= meter. They only have one unit.
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Which change in an object would increase the force needed to move the object​
creativ13 [48]

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Answer:

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6 0
3 years ago
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