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Stella [2.4K]
3 years ago
8

This Chinese invention allowed ships to move their sails and to sail into the wind for the first time.

Social Studies
1 answer:
MrRissso [65]3 years ago
7 0
Rudder is a Chinese innovation permitted boats to move their sails and to cruise into the twist interestingly. The most punctual say of the ship rudder originates from a picture on a bit of stoneware which goes back to first century in China, amid the Han Dynasty. This originates before the presentation of the rudder in the Western world by around a thousand years.
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8 0
3 years ago
determine the force of gravitational attraction between a 78kg boy sitting 2 meters away from a 65kg girl.
Firdavs [7]

Answer:

F = 8.45 * 10^-8 N

Explanation:

The gravitational force is calculated using

F = GMm/r²

Where

G represent gravitational constant = 6.67 * 10^(-11)

M = Mass of the boy = 78kg

m = Mass of the girl = 65kg

r = Distance between them = 2m

Substitute these values in the formula, we have:

F = (6.67 * 10^(-11) * 78 * 65)/2²

F = (6.67 * 78 * 65 * 10^(-11))/4

F = (33816.9 * 10^(-11))/(4)

[Divide by the denominator]

F = 8454.225 *10^(-11)

[Expand]

F = 8.454225 * 10³ * 10^(-11)

F = 8.454225 * 10^(3-11)

F = 8.454225 * 10^-8

[Approximate]

F = 8.45 * 10^-8 N

Hence, the force of attraction between them is 8.45 * 10^-8 N

7 0
2 years ago
Discribe the role of citizes information of a democratic country?​
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Answer:

The key role of citizens in a democracy is to participate in public life.

8 0
3 years ago
What issue did the missouri compromise resolve?
snow_tiger [21]

I believe the answer would be first one

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