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jekas [21]
3 years ago
7

19. A mass of gas has a volume of 4 m3, a temperature of 290 K, and an absolute pressure of 475 kPa. When the gas is allowed to

expand to 6.5 m3, its new temperature is 277 K. What's the absolute pressure of the gas after expansion?
Physics
1 answer:
Aleks [24]3 years ago
8 0

Recall this gas law:

\frac{P₁V₁}{T₁} = \frac{P₂V}{T₂}

P₁ and P₂ are the initial and final pressures.

V₁ and V₂ are the initial and final volumes.

T₁ and T₂ are the initial and final temperatures.

Given values:

P₁ = 475kPa

V₁ = 4m³, V₂ = 6.5m³

T₁ = 290K, T₂ = 277K

Substitute the terms in the equation with the given values and solve for Pf:

\frac{475*4}{290} = \frac{P₂*6.5}{277}

<h3>P₂ = 279.2kPa</h3>
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Masja [62]

Answer:

Explanation:

1. An ideal ammeter has very small or almost zero resistance. As the resistance is small the maximum current can pass through the ammeter which it can read it.

2. An ideal voltmeter has very large or infinite resistance. As the resistance is very large so the maximum voltage drops across the resistor and gives the accurate reading.

4 0
3 years ago
The gravitational acceleration on Earth is 9. 8 m/s2. What is the weight of a car on Earth (to the nearest whole number) if it h
astraxan [27]

Hi there!

Recall the equation for weight.

W = Mg

W = Weight (N)

M = Mass (kg)
g = acceleration due to gravity (m/s²)


The weight of an object depends upon its MASS and the strength of the GRAVITATIONAL field. We can solve for weight:

W = 1360 * 9.8 = \boxed{13,328 N}

6 0
2 years ago
A transfer of charge is actually a gross movement of
Sphinxa [80]
Who pays the income tax, the payroll tax, the estate and gift taxes? Who bears the burden of the gasoline and tobacco taxes? If Congress were to raise this tax rate, or lower that tax deduction, who would gain and who would lose? The outcomes of the political battles over changes in the tax system often hinge on the answers to such questions. This paper will discuss the economic consequences of taxation and the factors that influence where the burden of various taxes really falls. It will review some of the discussions in the economic literature. Finally, it will suggest that a shift to a markedly different type of tax system would benefit all players in the economy.
3 0
2 years ago
A thin block of soft wood with a mass of 0.072 kg rests on a horizontal frictionless surface. A bullet with a mass of 4.67 g is
kozerog [31]

Answer:

v’= 279.66 m / s

Explanation:

We work this exercise using the conservation of the moment. For this we define the system formed by the two blocks, therefore the forces during the collision are internal of the action and reaction type.

Initial instant. Before the crash

        p₀ = m v₀ + 0

Final moment. After the crash

        p_f = m v + M v ’

how the tidal wave is preserved

       p₀ = p_f

       m v₀ = m v + M v ’

       v = \frac{m v_o - Mv'}{m}

let's calculate

       v ’= \frac{0.00467 \ 619 - 0.072 \ 22}{0.004676}

       v ’= \frac{2.89- 1.584}{ 0.00467}

       v ’= 279.66 m / s

4 0
3 years ago
If the Spirit of Australia, a boat,reaches speeds of 318.67 mph for 0.75 hours (45 minutes), what is the distance it traveled?
Rudiy27

Answer: 239.0025 miles.

Explanation:

First we have the relationship:

Distance  = speed*time.

Because how it is worded, i guess that the boat can mantain a constant speed of 318.67 mph for 0.75 hours.

Then, we have the speed and the time, with those values we can find the distance.

speed = 318.67 mph

Time = 0.75 hours.

Distance = 318.67 mph*0.75h = 239.0025 miles.

6 0
3 years ago
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