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Studentka2010 [4]
3 years ago
12

Assuming that all of the carbon dioxide ends up in the balloon, what will be the volume of the balloon at a temperature of 27 ∘C

and a pressure of 742 mmHg ?
Physics
2 answers:
Alexandra [31]3 years ago
6 0

Answer:

The volume of the balloon would be (580.12m) cm^3

Explanation:

From the ideal gas equation,

PV = nRT

P is pressure in the balloon = 742 mmHg = 742/760 = 0.976 atm

V is the volume of the balloon

n is the number of moles of carbon dioxide in the balloon. Let the mass of carbon dioxide be m.

n = mass/MW = m/44 = (0.023m) mol

R is gas constant = 82.057 cm^3.atm/mol.K

T is temperature of the balloon = 27 °C = 27 + 273 = 300 K

V = 0.023m × 82.057 × 300/0.976 = (580.12m) cm^3

horsena [70]3 years ago
3 0

Answer:

Explanation:

Given:

P = 742 mmHg

= 98925.2 Pa

T = 22 °C

= 295 K

R = 8.3145 J/mol.K

Molar mass of CO2, M = 12 + (16*2)

= 44 g/mol

Number of moles = mass/molar mass

= 28.8/44

= 0.655 mol.

Using ideal gas law,

PV = nRT

V = nRT/P

= 0.655 × 8.3145 × 295/98925.2

= 0.0162 m^3

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In a mail-sorting facility, a 2.50-kg package slides down an inclined plane that makes an angle of 20.0° with the horizontal. Th
lawyer [7]

Answer:

The coefficient of kinetic friction is 0.382.

Explanation:

Given:

Angle of inclination is, \theta=20.0°

Mass of package is, m=2.50\ kg

Initial speed of package is, u=2.00\ m/s

Final speed of the package at the bottom is, v=0\ m/s

Distance of travel along the incline is, d=12.0\ m

Acceleration due to gravity is, g=9.8\ m/s^2

Let the coefficient of kinetic friction be \mu.

Now, the frictional force will be acting along the incline but in the direction opposite to the direction of motion.

So, the net acceleration acting on the package will be up the incline and is equal to:

a=\mu g\cos\theta-g\sin\theta ----------------- 1

Now, using equation of motion, we have:

v^2-u^2=2ad\\\\0-(2.00)^2=2a(12.0)

Solving for 'a', we get:

-4.00=24.0a\\\\a=-\frac{4}{24}=-\frac{1}{6}\ m/s^2

Now, plug in the value of 'a' in equation (1). This gives,

\mu g\cos\theta-g\sin\theta=\frac{1}{6} ( Neglecting negative sign)

Plug in all the given values and solve for \mu. This gives,

9.8(-sin(20)+\mu cos(20))=\frac{1}{6}\\\\-0.342+\mu\times 0.94=0.017\\\\0.94\mu=0.342+0.017\\\\0.94\mu=0.359\\\\\mu=\frac{0.359}{0.94}=0.382

Therefore, the coefficient of kinetic friction is 0.382.

5 0
4 years ago
There is more than one answer
Sveta_85 [38]

Explanation:

the answers are the first 3.

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3 years ago
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When I bump the table, the coffee in my cup spilled out. Newton's _____ law explains this reaction.
Ivan
When I bump the table, the coffee in my cup spilled out. Newton's 1st law explains this reaction.

Answer: A) or the first option.
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The image shows a roller coaster.
mariarad [96]
I believe the answer is c but I’m not 100% sure
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A penny is dropped from the top of a tower. It hits the ground below after 2.5 s. How tall was the tower?
pychu [463]

Answer:

C. 30.6m

Explanation:

To find the height of the tower, we are to use Newtons law of motion to solve this problem. Since the penny is falling from the top of the tower, it is acted by the acceleration due to gravity. The formula to be used is:

H=ut+\frac{1}{2}gt^2

Where H is the height of the tower, t is the time taken to hit the ground, u is the initial velocity and g is the acceleration due to gravity.

Given that, t = 2.5 s, g =9.8 m/s², u = 0 m/s (at the top of tower)

H=ut+\frac{1}{2}gt^2\\\\H=0(2.5)+ \frac{1}{2}(9.8)(2.5)^2\\\\H=30.6\ m

3 0
3 years ago
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