Let consider that gas inside the cylinder behaves ideally and process is isothermal, so that change in internal energy can be neglected. The engine cylinder is modelled after the First Law of Thermodynamics:

$W + P\cdot(V_{in}-V_{out}) = 0$

$W = P\cdot (V_{out}-V_{in})$

$W = P\cdot A\cdot \Delta x$

$W = (7.5\times 10^{5}\,Pa)\cdot (0.01\,m^{2})\cdot (0.04\,m)$

$W = 300\,kPa$

The positive sign indicates that work is done by the gas.

7 0

3 years ago

What is fliud mechanism

jarptica [38.1K]

Answer:

The study of forces and flow within fluids.

8 0

3 years ago

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Humans require organ systems to carry out life processes. Single-celled organisms do not have organ systems and yet they are abl

k0ka [10]

Answer: is Organelles present in single-celled organisms act in a manner similar to organ systems

Explanation:

Multicellular organisms organ system play a critical role for the smooth functioning of whole body. Millions of cells combined to make an organism. The role of organ system in whole body is to provides oxygen and nutrients to the cells and eliminates the toxic material such as carbon dioxide. Organ systems like, respiratory system, digestion system, and cardiovascular play an important role in the human body to perform various functions for its survival.

Unlike multicellular organisms the unicellular only consists of single cell e.g. prokaryotic organisms and eukaryotic organisms namely, Amoeba, Euglena, salmonella, Fungi etc. Single celled organisms are able to carry out all processes mandatory for the sustenance of life with the help of single cell only e.g. respiration and digestion.They can survive with the help of single cell. Unlike multicellular organisms unicellular do not require multiple number of cell for its survival.

5 0

3 years ago

An ideal heat-engine is to be used in an environment where the ambient temperature is 23.5 °C. What should be the minimum temper

Digiron [165]

Answer:

The minimum temperature of the hot reservoir = 231.25 °C

Explanation:

η₁ = (1- T(c)/T(h)) × 100 ............. equation 1

Where η₁ = efficiency of the heat engine in percentage, T(c) = Temperature at which the low temperature reservoir operates, T(h)) =Temperature at which the high temperature reservoir operates.

Making T(h) the subject of the equation in equation 1

T(h) = T(c)/ {1-(η₁ /100)}

where η₁ = 41.2%, T(c) = 23.5 °C = 23.5 + 273 =296.5 K

∴T(h) = 296.5/{1-(41.2/100)}

T(h) = 296.5/(1- 0.412)

T(h) = 296.5/0.588

T(h) =504.25 K

Convert to temperature in Celsius

T(h) = 504.25 - 273 =231.25 °C

The minimum temperature of the hot reservoir = 231.25 °C

3 0

3 years ago