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lubasha [3.4K]
3 years ago
5

Rocks in the Earth's mantle contain a higher percentage of _______ and _______ than do rocks in the Earth's crust.

Physics
2 answers:
Elenna [48]3 years ago
8 0
The Answer is C - iron and magnesium :)
kupik [55]3 years ago
5 0
The answer is c.......
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Help me please, help
Alisiya [41]

Answer:

455,000 Pa

Explanation:

PV = nRT

If n is constant:

PV / T = PV / T

(101,325 Pa) (718 mL) / (273 K) = P (175 mL) / (26 + 273) K

P = 455,000 Pa

6 0
3 years ago
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Jack tries to place magnets on the door of his refrigerator. He observes that the magnets don’t stick. He guesses that the door
jonny [76]

B. Construct a hypothesis

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3 years ago
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1. A 6-volt battery produces a current of 0.5 amps. What is the power in the circuit?
allochka39001 [22]

Answer:

hope this will help you

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Explanation:

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8 0
3 years ago
A photovoltaic coverts _____ energy
Grace [21]

A photovoltaic conversion changes luminosity energy to electrical energy.

4 0
3 years ago
A positively-charged object with a mass of 0.129 kg oscillates at the end of a spring, generating ELF (extremely low frequency)
9966 [12]

Answer:308 N/m

Explanation:

Given

mass\left ( m\right )=0.129 kg

wavelength\left ( \lambda \right )=3.86\times 10^7

We know frequency =\frac{c}{\lambda }=\frac{3\times 10^8}{3.86\tmes 10^7}

f=7.772 Hz

As the frequency of radio waves is same as the frequency at which object oscillates

f=\frac{1}{2\pi }\sqrt{\frac{k}{m}}

7.772=\frac{1}{2\pi }\sqrt{\frac{k}{0.129}}

7.772\times 2\times \pi =\sqrt{\frac{k}{0.129}}

k=307.70\approx 308 N/m

7 0
4 years ago
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