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yarga [219]
3 years ago
11

Steel has a density of 7.8 g/cm3. what is the mass of a block of steel with a volume of 600.0 cm3?

Physics
1 answer:
AlladinOne [14]3 years ago
6 0
The answer to this is 4,680
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The moon orbits the earth at a distance of 3.85 x 10^8 m. Assume that this distance is between the centers of the earth and the
Inga [223]

Answer:

27.5 days

0.92 month

Explanation:

r = radius of the orbit of moon around the earth = 3.85\times10^{8} m

M = Mass of earth = 5.98\times10^{24} m

T = Time period of moon's motion

According to Kepler's third law, Time period is related to radius of orbit as

T^{2} = \frac{4\pi ^{2} r^{3}  }{GM}

inserting the values, we get

T^{2} = \frac{4(3.14)^{2} (3.85\times10^{8})^{3}  }{(6.67\times10^{-11})(5.98\times10^{24})}\\T = 2.3754\times10^{6} sec

we know that

1 day = 24 hours = 24 x 3600 sec = 86400 s

T = 2.3754\times10^{6} sec \frac{1 day}{86400 sec} \\T = 27.5 days

1 month = 30 days

T = 27.5 days \frac{1 month}{30 days} \\T = 0.92 month

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3 years ago
During which step of the technological design process would a scientist try to determine if anyone has already studied the probl
Vadim26 [7]
Background research.
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• List two conditions needed for transfer of heat by conduction
Murljashka [212]

Answer:

Difference in temperature

Contact between the bodies

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Explanation: heat of fusion

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A train travels 90 kilometers in 4 hours, and then 82 kilometers in 1 hours. What is its average speed?
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Average speed = total distance / total time.

That's 172 km / 5 hr = 34.4 km//hr
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