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jasenka [17]
3 years ago
14

Which statement about Earth's core helps explain Earth's magnetic field?

Chemistry
2 answers:
Vesnalui [34]3 years ago
5 0

Answer:

it should be B. earths core is composed of iron and nickel, if not let me know.

Sunny_sXe [5.5K]3 years ago
4 0

Answer: B. Earth's core is composed of iron and nickel.

Explanation: The inner core is solid so C and D are incorrect and A is incorrect because the core isn't made of magnets so it has to be B.

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An object has a velocity of 8m/s and a kinetic energy of 480 j what is the mass of the object
MariettaO [177]
Kinetic energy=Ek
Ek=(1/2)mv²
Ek=480 J
v=8 m/s
mass=?

Ek=(1/2)mv²
480 J=(1/2)m(8 m/s)²
480 J=(32 m²/s²) m
m=(480 J)/(32 m²/s²)=15 kg

answer: the mass of the object is 15 kilograms. 
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