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Nonamiya [84]
1 year ago
7

1.- Un balín de acero a 20 C tiene un volumen de 0.004 m3. ¿Cuál es la dilatación que sufre cuando su temperatura aumenta a 50 C

?
Physics
1 answer:
Brrunno [24]1 year ago
0 0

Answer:

\Delta V = 1.440\times 10^{-6}\,m^{3}

Explanation:

El coeficiente de expansión volumétrica se calcula a partir de la siguiente ecuación diferencial parcial (The volumetric expansion coefficient is computed by means of the following partial differential equation):

\alpha = \frac{1}{V} \cdot \left(\frac{\partial V}{\partial T} \right)

Se integra la fórmula a continuación (The formula is integrated herein):

\alpha\, dT = \frac{dV}{V}

Supóngase que el coeficiente es constante (Let suppose that coefficient is constant):

\alpha \int\limits^{T_{f}}_{T_{o}}\,dT = \int\limits^{V_{f}}_{V_{o}}\, \frac{dV}{V}

\alpha \cdot (T_{f}-T_{o}) = \ln \frac{V_{f}}{V_{o}}

El volumen final es (The final volume is):

V_{f} = V_{o}\cdot e^{\alpha \cdot (T_{f}-T_{o})}

El coeficiente de expansión volumétrica del acero es 12\times 10^{-6}\,^{\circ}C^{-1} (The volumetric expansion coefficient of steel is 12\times 10^{-6}\,^{\circ}C^{-1}):

V_{f} = (0.004\,m^{3})\cdot e^{(12\times 10^{-6}\,^{\circ}C^{-1})\cdot (50^{\circ}C-20^{\circ}C)}

V_{f} \approx 4.001\times 10^{-3}\,m^{3}

Finalmente, la dilatación experimentada por el balín es (Lastly, the dillatation experimented by the pellet is):

\Delta V = 4.001\times 10^{-3}\,m^{3} - 4.000\times 10^{-3}\,m^{3}

\Delta V = 1.440\times 10^{-6}\,m^{3}

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denpristay [2]

Answer:

The swimming velocity under water is 1.23 mph

Explanation:

dynamic pressure = \frac{\rho v^2}{2}

where;

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v is the velocity of the fluid

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ρw is the density of water = 1.94 slug/ft³

ρa is the density of air = 0.00238 slug/ft³

given velocity of air in mph = 35 mph, converting to ft/s is as follows

35.\frac{miles}{hour}(\frac{5280 .ft}{1.mile})(\frac{1.hour}{60.mins})(\frac{1.min}{60.sec}) = 51.33\frac{ft}{s}

From this equation \frac{\rho _wV^2}{2} = \frac{\rho _aV^2}{2}, we determine the swimming velocity under water.

\frac{1.94 *V^2}{2} = \frac{0.00238*(51.33)^2}{2}\\\\0.97*V^2 = 3.135\\\\V^2 = \frac{3.135}{0.97} = 3.232\\\\V = \sqrt{3.232} \\\\V = 1.798\frac{ft}{s}

in mph; 1.798\frac{ft}{s} (\frac{1 .mile}{5280.ft})(\frac{3600.s}{1.hour}) =1.23 mph

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Fofino [41]
The combined-gas law relates which temperature, pressure and volume.

Temperature=T
Pressure=P
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(P₁*V₁) / T₁=(P₂*V₂) / T₂

D. Temperature, pressuere and volume.
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AlexFokin [52]

Answer :

beaker A , it is because the temperature increases is higher than beaker B.

Formula

(10°F − 32) × 5/9 + 273.15 = 260.928K

10 degrees fahrenheit = 260.928 kelvins

Formula

(10K − 273.15) × 9/5 + 32 = -441.7°F

10 kelvins = -441.67 degrees fahrenheit

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1 year ago
A clock is shaped like a circle with a diameter of 14 in. to the nearest inch, what is the circumference of the clock?
bija089 [108]

Answer:

C≈43.98 or 44

Explanation:

A clock is shaped like a circle with a diameter of 14 in. Therefore, to the nearest inch, the circumference of the clock is 43.98 inches or 44 inches.

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