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antoniya [11.8K]
3 years ago
12

The tendency for an object at rest to remain at rest

Physics
1 answer:
Zarrin [17]3 years ago
7 0
Inertia is the force in play here
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Why pressure above the surface is greater than in the air​
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Answer:

At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels. ... Since most of the atmosphere's molecules are held close to the earth's surface by the force of gravity, air pressure decreases rapidly at first, then more slowly at higher levels.

Explanation:

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To introduce you to the concept of escape velocity for a rocket. the escape velocity is defined to be the minimum speed with whi
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A projectile fired upward from the Earth's surface will usually slow down, come momentarily to rest, and return to Earth. For a certain initial speed, however it will move upward forever, with its speed gradually decreasing to zero just as its distance from Earth approaches infinity. The initial speed for this case is called escape velocity. You can find the escape velocity v for the Earth or any other planet from which a projectile might be launched using conservation of energy. The projectile of mass m leaves the surface of the body of mass M and radius R with a kinetic energy Ki = mv²/2 and potential energy Ui = -GMm/R. When the projectile reaches infinity, it has zero potential energy and zero kinetic energy since we are seeking the minimum speed for escape. Thus Uf = 0 and Kf = 0. And from conservation of energy,
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mv²/2 -GMm/R = 0
∴ v = √(2GM/R) 

This is the expression for escape velocity. 
3 0
3 years ago
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If we have less power, we most likely have
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The same amount of work being done over a long period of time!
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which of the following safety harnesses is the safest and most recommended when hunting from a treestand?
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The best tree stand safety harness is the Hunter Safety System Hybrid Flex Safety Harness, with its awesome ElimiShield Scent Control Technology.

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You can learn more about this at:

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25

Explanation:

simple facts.

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