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pishuonlain [190]
3 years ago
11

Which statements about Earth’s core help explain Earth’s magnetic field? Select three options.

Physics
2 answers:
uysha [10]3 years ago
6 0

the inner core is solid. the outer core is liquid and moving.  Earth's core is composed of iron and nickel

Evgen [1.6K]3 years ago
5 0

Answer: B,E,F

Explanation:

(B) the inner core is solid. (E) the outer core is liquid and moving. (F) Earth's core is composed of iron and nickel

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Which one is having lesser ressistance. a 60w bulb or a 40w bulb?
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A generator uses a coil that has 100 turns and a 0.50-T magnetic field. The frequency of this generator is 60.0 Hz, and its emf
lana [24]

Answer:

38 m

Explanation:

Number of turns=N=100

Magnetic field=B=0.50 T

Frequency of the generator=f=60 Hz

Rms value of emf=E_{rms}=120 V

We have to find the length of the wire from which the coil is made.

Peak value of emf=E_0=E_{rms}\sqrt 2=120\times \sqrt 2=169.7 V

Length of wire=4\sqrt{\frac{NE_0}{2\pi fB}}

Substitute the values

Length of wire=4\times \sqrt{\frac{169.7\times 100}{0.50\times 2\pi\times 60}}

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6 0
3 years ago
A small apple weighs 0.8N. How much would an apple that is 4 times as massive weigh?
-BARSIC- [3]

Answer:

W=31.99 N

Explanation:

W= 8 N (N= kg*m/ s^2)

W= m* g

8 N= m * 9.8 m/s^2

m= 0.816 kg

m*4= (0.816)4

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W=31.99 N

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