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Zielflug [23.3K]
3 years ago
5

Is true that the earth's crust is made up of many tectonic plates?

Physics
1 answer:
RUDIKE [14]3 years ago
4 0
Yes, it is true.<span> In the 20th century, researchers realized that the </span>Earth's crust<span> is not one piece, but is </span>made up of many<span> huge </span>tectonic plates<span> upon which the continents ride.</span>
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If two objects move farther apart from one another, the force of gravity will
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A freight train car is moving at a constant speed with respect to the ground of Vcg. A man standing on a flatbed car throws a ba
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Explanation:

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Newton’s first and second laws interactive reader
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How many charges are required to have an electric field
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7 0
3 years ago
A lumberjack (mass = 103 kg) is standing at rest on one end of a floating log (mass = 255 kg) that is also at rest. The lumberja
mina [271]

Answer:

(a) -1.18 m/s

(b) 0.84 m/s

Explanation:

(a)

The total linear momentum before the lumberjack begins to move is zero because all parts of the system are at res

From the law of conservation of momentum

m1v1+m2v2=0 hence m1v1=-m2v2 where m1 is mass of lumberjack, v1 is velocity of lumberjeck, m2 is mass of floating log, v2 is velocity of the floating log.

Substituting M1 for 103 Kg, V1 for 2.93 m/s, M2 for 255 Kg into the above equation we obtain

103Kg*2.93 m/s=-255Kg*V2

V2=-(103 kg*2.93 m/s)/255=-1.183490196  m/s

Hence V2=-1.18 m/s

(b)

For the second log

V(M1+M2)=m1v1 where V is the common velocity

V(103 Kg+255 Kg)=103 Kg*2.93 m/s

V=(103 Kg*2.93 m/s)/(103 Kg+255 Kg)=0.842988827  m/s

V=0.84 m/s

6 0
2 years ago
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