All categories

3 years ago

Assume patmos=1.00atm. what is the gas pressure pgas? express your answer in pascals to three significant figures.

Physics

2 answers:

hodyreva [135]3 years ago

8 0

Answer: Well, let's start by finding the pressure due to the "extra" height of the mercury. p = 1.36e4 kg/mÂł Â· (0.105m - 0.05m) Â· 9.8m/sÂ˛ = 7330 N/mÂ˛ = 7330 Pa The pressure at B is clearly p_b = p_atmos = p_gas + 7330 Pa The pressure at A is p_a = p_gas = p_atmos - 7330 Pa c) 1 atm = 101 325 Pa Then p_gas = 101325 Pa - 7330 Pa = 93 995 Pa

ANTONII [103]3 years ago

3 0

The gas pressure is about 9.40 × 10⁴ Pa

$\texttt{ }$

<h3>Further explanation</h3>

Let's recall Hydrostatic Pressure formula as follows:

$\boxed{ P = \rho g h}$

where:

P = hydrosatic pressure ( Pa )

ρ = density of fluid ( kg/m³ )

g = gravitational acceleration ( m/s² )

h = height of a column of liquid ( m )

Let us now tackle the problem!

$\texttt{ }$

Complete Question:

A U-shaped tube is connected to a box at one end and open to the air at the other end. The box is full of gas at pressure pgas, and the tube is filled with mercury of density 1.36 × 10⁴ kg/m³ . When the liquid in the tube reaches static equilibrium, the mercury column is h₁ = 10.5 cm high in the left arm and h₂ = 5.00 cm high in the right arm. Assume p_atmos = 1.00 atm , what is the gas pressure p_gas?

Given:

density of mercury = ρ = 1.36 × 10⁴ kg/m³

atmospheric pressure = p_o = 1.00 atm = 76 cmHg

height difference of liquid column = Δh = 10.5 - 5.00 = 5.5 cm

Asked:

gas pressure = p_gas = ?

Solution:

Because the height difference of mercury column is 5.5 cm , then the pressure difference between the left arm and the right arm will be 5.5 cmHg.

$\Delta p = p_o - p_{gas}$

$5.5 \texttt{ cmHg} = 76 \texttt{ cmHg} - p_{gas}$

$p_{gas} = 76 \texttt{ cmHg} - 5.5 \texttt{ cmHg}$

$p_{gas} = 70.5 \texttt{ cmHg}$

$p_{gas} = 1.36 \times 10^4 \times 9.8 \times 0.705 \texttt{ Pa}$

$p_{gas} = 93962.4 \texttt{ Pa}$

$p_{gas} \approx 9.40 \times 10^4 \texttt{ Pa}$

$\texttt{ }$

<h3>Learn more</h3>

Buoyant Force : brainly.com/question/13922022

Kinetic Energy : brainly.com/question/692781

Volume of Gas : brainly.com/question/12893622

Impulse : brainly.com/question/12855855
Gravity : brainly.com/question/1724648

$\texttt{ }$

<h3>Answer details</h3>

Grade: High School

Subject: Physics

Chapter: Pressure

You might be interested in

A. State whether the acceleration is positive, negative or zero for each section in the speed versus

bazaltina [42]

Answer:

a=positive

b=0

c=positive

d=negative

Explanation:

a=acceleration depends on the speed and time. if the speed and time are increasing at the same rate, the acceleration value will be positive as the vehicle is speeding up.

b=the speed and time are not increasing, therefore the vehicle is either stationary or travelling at a steady pace.

c=same explanation as a

d=the speed and time are not increasing at the same rate as the speed is decreasing. this means that the car is slowing down

5 0

2 years ago

A completely inelastic collision occurs between two balls of wet putty that move directly toward each other along a vertical axi

Marrrta [24]

Answer:

h = 2.64 meters

Explanation:

It is given that,

Mass of one ball, $m_1=3\ kg$

Speed of the first ball, $v_1=20\ m/s$ (upward)

Mass of the other ball, $m_2=2\ kg$

Speed of the other ball, $v_2=-12\ m/s$ (downward)

We know that in an inelastic collision, after the collision, both objects move with one common speed. Let it is given by V. Using the conservation of momentum to find it as :

$V=\dfrac{m_1v_1+m_2v_2}{m_1+m_2}$

$V=\dfrac{3\times 20+2\times (-12)}{3+2}$

V = 7.2 m/s

Let h is the height reached by the combined balls of putty rise above the collision point. Using the conservation of energy as :

$mgh=\dfrac{1}{2}mV^2$

$h=\dfrac{V^2}{2g}$

$h=\dfrac{7.2^2}{2\times 9.8}$

h = 2.64 meters

So, the height reached by the combined mass is 2.64 meters. Hence, this is the required solution.

5 0

3 years ago

Which of the following statement(s) about energy and phase is/are correct? Select all that apply. Choose one or more: A. While o

Free_Kalibri [48]

Answer: Option (A) and (D) are the correct statements.

Explanation:

Potential energy is defined as the energy obtained by an object due to its position. Whereas kinetic energy is defined as the energy obtained by an object due to the motion of its molecules.

When there will be only one phase present then addition or removal of energy will lead to change in kinetic energy of the substance but no change in potential energy will take place.

Whereas if change in phase is occurring then adding or removing any energy will lead to change in potential energy of the substance while kinetic energy will remain the same.

Thus, we can conclude that correct statements are as follows.

While only one phase is present, adding or removing energy changes PE but not KE.

During a phase change, adding or removing energy changes PE but not KE.

3 0

4 years ago

Where is the oldest operating lighthouse on the west coast on an island in america?

Vera_Pavlovna [14]

The Alcatraz Island light house off the coast of California's San Francisco Bay. It is located on the south side of the island.

6 0

4 years ago

Which describes the wavelength of a wave?

NARA [144]

So we want to know what physical quantity represents the wavelength of a wave. Waves have a few phyiscal quantities that are used to describe them. Frequency, amplitude and wavelength. Frequency is the number of oscillations in a specific time interval, amplitude is the maximal elongation of a wave and wavelength is the distance from one point ona a wave to the next similar point. So the correct answer is B.

6 0

3 years ago