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LenKa [72]
3 years ago
9

If the hypotenuse of a right triangle is 12 and an acute angle is 37 degrees find leg a and leg b lengths

Engineering
1 answer:
bezimeni [28]3 years ago
8 0

scrity añao devid codicie

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A gas is compressed isothermally in a piston-cylinder assembly from 7.6 bar, 77 °C to 3.05 bar. Determine the work and heat tran
yaroslaw [1]

Answer:

The work done or the heat transfer for air and hydrogen are 91.71 kj/kg and 1317.89 kj/kg respectively.

Explanation:

Given:

Initial pressure is 7.6 bar.

Initial temperature is 77 °C.

Final pressure is 3.05 bar.

Calculation:

(a)

Take air as an ideal gas with gas constant 0.287 kj/kgK.  

Step1

For isothermal process work done and heat transfer is the same because of no change in internal energy.

Work done is calculated as follows:

W=RT_{1}ln\frac{P_{1}}{P_{2}}

W=0.287(77+273)ln\frac{7.6}{3.05}

W = 91.71 kj/kg.

Thus, the work done or the heat transfer for isothermal process is 91.71 kj/kg.

Step2

For isothermal process work done and heat transfer is the same because of no change in internal energy. Take Hydrogen as an ideal gas with gas constant 4.1242 kj/kgK.

Work done is calculated as follows:

W=RT_{1}ln\frac{P_{1}}{P_{2}}

W=4.1242(77+273)ln\frac{7.6}{3.05}

W = 1317.89 kj/kg.

Thus, the work done or the heat transfer for isothermal process is 1317.89 kj/kg.

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3 years ago
Rearrange the formula to make “u” the subject. <br><br> v - u<br> ——— = t<br> a
solong [7]

Answer:

u = v - a * t

Explanation:

   v - u

t = ------

       a

v  - u  =  a * t

v - a * t = u

therefore,  u = v - a * t

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The future perfect tense forms are made by putting ‘will / shall + have’ before the past participle from the verb. these sentences can be changed into the passive if the active verb has an object


i hope this helps :D thanks
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When the psychologist simply records the relationship between two variables...
Wewaii [24]
When a psychologist simply records the relationship between two variables without manipulating them, it is called a correlational study.

The observed relationship does not by itself reveal which variable causes the other. This is the directionally problem. Also, the relationship may be due to a third variable controlling both of the observed variables.
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Do plastic materials have high or low ductility? Explain why.​
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The impact behavior of plastic materials is strongly dependent upon the temperature. At high temperatures, materials are more ductile and have high impact toughness. At low temperatures, some plastics that would be ductile at room temperature become brittle.
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