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3 years ago

How to study thermodynamics?

2 answers:

8 0

Thermodynamics is one of the few engineering courses that I would say are more conceptual than computaional. I can not emphasise how important it is to fully understand thermodynamic terminology and process. Once you understand those any problems can be easily worked out.

What I recommend is that you go through you thermodynamics book and read it carefully highlighting the important points and summarizing them in a spare notebook. The first few chapters are full of indroductory concepts such as the state of a system, processes, closed and open systems, etc. That I reccomend you memorize(with understanding ofcourse) as these are carried on all throughout.

As chapters get more complex I recommend flow charts and mind maps with as much condensed information as possible.
Hope this helps <3
Help me and mark as brainliest plz

expeople1 [14]3 years ago

7 0

It is study of the relationships between heat, temprature, work and energy

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Investiga por que esta simple actividad puede ayudar a mejorar las condiciones ambientales que tu comunidad?

skad [1K]

Creo que por simple actividad hablas de reciclar no?

Espero que sea de ayuda (:

Permite ahorrar energía de forma significativa. Es menos costoso reciclar un material que fabricarlo desde cero, como ocurre por ejemplo con el vidrio.

Reciclar ayuda a evitar la explotación de los recursos naturales. El reciclaje hace posible que los materiales originales puedan ser aprovechados con un nuevo uso, sin que sea necesario volver a usar recursos naturales para fabricarlos.

Se evitan los métodos de extracción de recursos naturales, que son invasivos y contaminantes. El reciclaje permite no sustraer nueva materia prima para fabricación y se puede simplemente reciclar la materia existente.

Se reduce la contaminación, proporcionando una atmósfera más limpia. Reciclando ayudamos a reducir el daño producido al medio ambiente.

Se conserva el medio ambiente ya que permite reducir la cantidad de desechos sólidos que llegan a los vertederos. Esto hace posible que los vertederos ocupen menos espacio e incluso puedan llegar a cerrarse, evitando el impacto negativo que causan sobre el medio ambiente.

Permite alargar la vida útil de los vertederos, ya que se llenan a un menor ritmo evitando que se abran más vertederos.

Si depositamos los desechos que generamos en el contenedor correspondiente para que sean reciclados se reducen los costes de recolección y clasificación de los residuos, ya que son las personas las que ayudan a realizar dicha labor.

En algunos centros de reciclaje ofrecen una compensación económica por llevar material reciclable, como latas y botellas de plástico, por lo que puedes obtener un pequeño ingreso extra reciclando.

7 0

3 years ago

Consider a steam turbine, with inflow at 500oC and 7.9 MPa. The machine has a total-to-static efficiency ofηts=0.91, and the pre

sergiy2304 [10]

Answer: $\dot m_{in} = 23.942 \frac{kg}{s}$ , $\dot H_{out} = 39632.62 kW$

Explanation:

Since there is no information related to volume flow to and from turbine, let is assume that volume flow at inlet equals to $\dot V = 1 \frac{m^{3}}{s}$ . Turbine is a steady-flow system modelled by using Principle of Mass Conservation and First Law of Thermodynamics:

Principle of Mass Conservation

$\dot m_{in} - \dot m_{out} = 0$

First Law of Thermodynamics

$- \dot W_{out} + \eta\cdot (\dot m_{in} \dot h_{in} - \dot m_{out} \dot h_{out}) = 0$

This 2 x 2 System can be reduced into one equation as follows:

$-\dot W_{out} + \eta \cdot \dot m \cdot ( h_{in}- h_{out})=0$

The water goes to the turbine as Superheated steam and goes out as saturated vapor or a liquid-vapor mix. Specific volume and specific enthalpy at inflow are required to determine specific enthalpy at outflow and mass flow rate, respectively. Property tables are a practical form to get information:

Inflow (Superheated Steam)

$\nu_{in} = 0.041767 \frac{m^{3}}{kg} \\h_{in} = 3399.5 \frac{kJ}{kg}$

The mass flow rate can be calculated by using this expression:

$\dot m_{in} =\frac{\dot V_{in}}{\nu_{in}}$

$\dot m_{in} = 23.942 \frac{kg}{s}$

Afterwards, the specific enthalpy at outflow is determined by isolating it from energy balance:

$h_{out} =h_{in}-\frac{\dot W_{out}}{\eta \cdot \dot m}$

$h_{out} = 1655.36 \frac{kJ}{kg}$

The enthalpy rate at outflow is:

$\dot H_{out} = \dot m \cdot h_{out}$

$\dot H_{out} = 39632.62 kW$

3 0

3 years ago

How many meters is equivalent to a mile?

Nutka1998 [239]

Answer:

1609.344 metres

I think, correct me if I'm wrong

5 0

3 years ago

Read 2 more answers

Compute the fundamental natural frequency of the transverse vibration of a uniform beam of rectanqular cross section, with one e

marshall27 [118]

Answer:

The natural angular frequency of the rod is 53.56 rad/sec

Explanation:

Since the beam is free at one end and fixed at the other hence the beam is a cantilevered beam as shown in the attached figure

We know that when a unit force is placed at the end of a cantilever the displacement of the free end is given by

$\Delta x=\frac{PL^3}{3EI}$

Hence we can write

$P=\frac{3EI\cdot \Delta x}{L^3}$

Comparing with the standard spring equation $F=kx$ we find the cantilever analogous to spring with $k=\frac{3EI}{L^3}$

Now the angular frequency of a spring is given by

$\omega =\sqrt{\frac{k}{m}}$

where

'm' is the mass of the load

Thus applying values we get

$\omega _{beam}=\sqrt{\frac{\frac{3EI}{L^{3}}}{Area\times density}}$

$\omega _{beam}=\sqrt{\frac{\frac{3\times 20.5\times 10^{10}\times \frac{0.1\times 0.3^3}{12}}{5.9^{3}}}{0.3\times 0.1 \times 7830}}=53.56rad/sec$

8 0

3 years ago

Read 2 more answers

A loss in value caused by an undesirable or hazardous influence offsite is which type of depreciation?

Lubov Fominskaja [6]

External depreciation may be defined as a loss in value caused by an undesirable or hazardous influence offsite.

<h3>What is depreciation?</h3>

Depreciation may be defined as a situation when the financial value of an acquisition declines over time due to exploitation, fray, and incision, or obsolescence.

External depreciation may also be referred to as "economic obsolescence". It causes a negative influence on the financial value gradually.

Therefore, it is well described above.

To learn more about Depreciation, refer to the link:

brainly.com/question/1203926

#SPJ1

5 0

2 years ago

How to study thermodynamics?​

How to study thermodynamics?