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gayaneshka [121]
3 years ago
7

A shell is fired with 500km/h on a target half kilometer away.In what time in which shell will hit the target.

Physics
1 answer:
Drupady [299]3 years ago
6 0

It depends on the direction in which the shell is launched.  The time can be anything from 3.6 seconds to never.

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A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of i
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Answer:

2.5 x 10⁷ J

Explanation:

F = thrust of the engine = 2.3 x 10⁵ N

d = distance traveled = 87  m

Work done by the engine is given as

W = F d =  (2.3 x 10⁵) (87) = 200.1 x 10⁵ J

W' = Net work done

W'' = work done by catapult

KE₀ = initial kinetic energy = 0 J

KE = final kinetic energy = 4.5 x 10⁷ J

Net work done is given as

W' = KE - KE₀

W' = 4.5 x 10⁷ J

We know that

W' = W + W''

4.5 x 10⁷ = 2.001 x 10⁷ + W''

W'' = 2.5 x 10⁷ J

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When a liquid is heated, the molecules gain kinetic energy. As the liquid begins to boil they have enough energy to break the intermolecular attractions between their neighbors. This happens first at the surface before the volume below has enough energy to boil. Thus you see high energy water molecules escaping from the surface as mist.
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4 years ago
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When a machine is used to do work, the force applied by the machine is called the effort force?
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Answer:

D) Reduce the internal friction of the engine's parts.

Explanation:

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3. Use deductive reasoning to prove the following statements.
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