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True [87]
3 years ago
7

What is meant by a 'closed system'?

Physics
2 answers:
VladimirAG [237]3 years ago
8 0

Answer:

A closed system is a physical system that does not allow transfer of matter in or out of the system, though, in different contexts, such as physics, chemistry or engineering, the transfer of energy is or is not allowed

Explanation:

vovangra [49]3 years ago
7 0

Answer:

Image result for What is meant by a 'closed system'?

A closed system is a physical system that does not allow transfer of matter in or out of the system, though, in different contexts, such as physics, chemistry or engineering, the transfer of energy

Explanation:

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Elaborate on the reason(s) that matter is said to move even as in a solid state.
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The matter does not move in solid state but vibrates.

<u>Explanation:</u>

The atoms inside the matter cannot move or shift their positions without any external force but makes some small vibration movements. Generally in solids, the particles are bound by the attractive forces acting in between the atoms inside the matter.

The small vibrations that are happening inside the matter are because of the external factors like temperature. The increase in temperature raises the kinetic energy of the atoms inside and makes them move faster and this results in the vibration of the matter.

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Find the speed of a long distance runner who runs 30km in 6 hours
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30mi/6hrs is a speed of 5 mph, which converts to a pace of 12 min/mi.

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How would the body be affected if red blood cells and low levels of homoglobinHow would the
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Low blood pressure. The person could faint and have an irregular heartbeat.
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What happens to air as it warms ,expands and become less dense
AleksandrR [38]
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3 years ago
An object is hung from a spring balance attached to the ceiling of an elevator cab. The balance reads 65 N when the cab is stand
lana66690 [7]

Answer:

(A) Reading will be 65 N

(B) Net force on the elevator will be 49.076 N    

Explanation:

We have given the balance force = 65 N

Acceleration due to gravity g=9.8m/sec^2

We know that W=mg

So 65=m\times 9.8

m = 6.632 kg

(a) In first case as the as the speed is constant so the force on the elevator will be 65 N

(B) In second case as the elevator is decelerating at a rate of 2.4m/sec^2

So net acceleration = 9.8-2.4=7.4m/sec^2

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3 years ago
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