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kirza4 [7]
3 years ago
15

A mass of gas has a volume of 4m3, a temperature of 290k, and an absolute pressure of 475 kpa. When the gas is allowed to expand

to 6.5m3, it's new temperature is 277K. What's the absolute pressure of the gas after expansion?
Physics
2 answers:
bogdanovich [222]3 years ago
5 0
Liquid alcohol will change to vapor when its temperature teaches the point
motikmotik3 years ago
4 0

Given:

V1 = 4m3

T1 = 290k

P1 = 475 kpa = 475000 Pa

V2 = 6.5m3

T2 = 277K

Required:

P

Solution:

n = PV/RT

n = (475000 Pa)(4m3) / (8.314 Pa-m3/mol-K)(290k)

n = 788 moles

P = nRT/V

P  = (788 moles)(8.314 Pa-m3/mol-K)(277K)/(6.5m3)

P = 279,204 Pa or 279 kPa

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Answer:

W = 47040  J

Explanation:

Given that,

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So,

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So, the required work done is 47040  J.

7 0
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When magnesium metal is heated in air it begins to release large amounts of heat and light. What kind of a reaction is this an e
kolezko [41]
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6 0
4 years ago
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A harmonic wave is traveling along a rope. the oscillator that generates the wave completes 46.0 vibrations in 26.0 s. a given c
Rudik [331]
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6 0
3 years ago
2. A woman prevents a 3kg brick from falling by pressing it against a vertical wall. The coefficient of friction
Anettt [7]
<h3>Answer:</h3>

49 N

<h3>Explanation:</h3>

<u>We are given;</u>

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  • The coefficient of friction as 0.6

We are required to determine the force that must be applied by the woman so the brick does not fall.

  • We need to importantly note that;
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But; Friction force = μ F

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6 0
3 years ago
Name the distance that is 10 times smaller than centimeter
Svetllana [295]
1 millimeter.

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