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Vikki [24]
3 years ago
9

The Earth and the spaceship both have mass. The astronaut is attracted to Earth by gravity, but he is not attracted to the space

ship. Explain.
Chemistry
1 answer:
Shkiper50 [21]3 years ago
8 0
The spaceship does not have any gravitational pull. A spaceship can not produce its own gravity like Earth does.
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Anna [14]

I would say C. petroleum


A is wrong

B is impractical for "mainly used"

D thats too expensive

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A sleeping 68 kg man has a metabolic power of 65 w . you may want to review ( pages 323 - 327) . part a how many calories does h
Kazeer [188]

<u>Given:</u>

Mass = 68 kg

Power = 65 W

<u>To determine:</u>

Calories burned during an 8.0 hr sleep

<u>Explanation:</u>

Energy is expressed as:

Energy = Power * Time

Now, the unit of power = Watt (W)

1 W = 1 J/s i.e. 65 W = 65 J/s

Time = 8 hrs = 8 * 3600 s = 28800 s

Energy = 65 J/s * 28800 s = 1872000 J

Convert Joules (J) to calories (cal)

1 cal = 4.184 J

The calculated energy = 187200 J * 1 cal/4.184 = 447418 cal

Ans: The man burns nearly 447.4 kcal during an 8 hr sleep




8 0
3 years ago
Why solids do not undergo diffusion​
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Answer:

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<em>Hoped</em><em> </em><em>this</em><em> </em><em>helped</em><em> </em><em>in</em><em> </em><em>any</em><em> </em><em>way</em><em> </em>

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4 0
3 years ago
Which element has 32 protons in its nucleus? phosphorus cobalt germanium sulfur
vovangra [49]

Answer:

Germanium.

Explanation:

In a neutral atom: the number of protons = the number of electrons.

Atomic number of a neutral atom = number of electrons = number of protons.

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  • Cobalt is an element with atomic number 27 and thus contains 27 electrons and 27 protons.

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<em></em>

  • Sulfur is an element with atomic number 16 and thus contains 16 electrons and 16 protons.
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