1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bogdanovich [222]
2 years ago
13

If we burn 1 gr of ethyl alcohol (C2H5OH) this will translate into a release of about 50 W of thermal energy of the flame that r

aise the temperature of the hot and cold reservoirs of a Sterling engine at 55 °C and 95 °C respectively. If at steady state the engine turns at about 240 rpm, its gears are shaped as rings of radius ~2 cm and weigh 50 gr, how efficient (in %) is the transfer of energy via flame?
Chemistry
1 answer:
rjkz [21]2 years ago
5 0

Answer:

0.116%

Explanation:

efficiency of sterling engine = 1 - ( 55 + 273 )k / ( 95 + 273 ) k

                                               = 1 - ( 328 / 368 ) = 0.10869

<u>Determine how efficient the transfer of energy via flame is </u>

apply this relation ; energy of steady state / energy output  ---- ( 1 )

where;  <em><u>energy output</u></em> = efficiency of sterling engine * energy

                                     = 0.10869 * 50 = 5.4345 J/sec

<em><u>energy of steady state</u></em> = 1/2 * I * w^2  ------ ( 2 )

I = moment of inertia of engine = 2 * 10^-5 kgm^2

back to equation 2 :  

energy of steady state = 1/2 * ( 2 * 10^-5 ) * ( 240 * 2π / 60 )^2

                                      = 630.88 * 10^-5  J /sec

Input values into equation 1

= [ (630.88 * 10^-5 )  / 5.4345  ] * 100

= 0.116%

You might be interested in
Calculate the molarity of a solution made by adding 120 g of naoh (40.00 g/mol) to enough water to make 500.0 ml of solution. g
sertanlavr [38]

An: Calculate the molarity of a solution made by adding 120 g of NaOH (40.00 g/mol) to enough water to make 500.0 mL of solution. a) 4.0 M b) 6.0 M c) 1.0 ...

Explanation:

7 0
1 year ago
What is one advantage that proteins derived from beans have over proteins derived from red meats
lisov135 [29]

Answer: B. Proteins derived from beans have less saturated fat than proteins derived from red meats.

3 0
3 years ago
The line graph shows the heights of plants grown in fertilized and unfertilized soil. Based on this information, what will most
AfilCa [17]

Answer:

  • <u><em>g) Neither plant should increase by 1 cm in height.</em></u>

Explanation:

See the graph for this question on the figure attached.

The growing of the <em>plant A</em> is represented by the line that goes above the other. At start, that line has a slope that rises about 0.75 cm ( height increase) in 1 day. From the day 2 and forward the slope of the line decreases. The line reaches its highest point about at day 4 and seems to start decreasing. Thus, you should predict that on the day six it <em>most likely </em>does not increase in height.

The growing of the <em>plant B</em> is represented by the line drawn below the other. As for the plant B, the growing decreases with the number of days. Between the days 4 and 5 the line is almost flat, which means that <em>most likely</em> this plant will not grow on the day six or grow less than 0.5 cm.

Thus, for both plants you can say that <em>on day six, most likley, neither should increase by 1 cm in height (</em>option g).

4 0
2 years ago
If i run away is that stealing from my parents?
victus00 [196]

Answer:

uh no I guess because your not your parents property your their child

4 0
2 years ago
Read 2 more answers
Plz help me I am timed
Eddi Din [679]

Answer:

C. interior plains

Explanation:

sana makatulong

8 0
2 years ago
Read 2 more answers
Other questions:
  • To make common salt, what does Cl combine with? *
    9·1 answer
  • Antibiotic-resistant bacteria have an enzyme, penicillinase, that catalyzes the decomposition of the antibiotic. The molecular m
    13·1 answer
  • If an atom of chlorine had an atomic mass of 17 and it gained an electron what would you have?
    6·1 answer
  • A sample of an ideal gas is cooled from 50.0°C to 25.0°C in a sealed container at constant volume.
    6·1 answer
  • 18. An electric motor turns a belt that powers a pump. If this system is compared to the chemical reactions of the cell, which p
    15·1 answer
  • A monoprotic weak acid when dissolved in water is 0.66% dissociated and produces a solution with a pH of 3.04. Calculate the Ka
    7·1 answer
  • A. Use the words below to complete the sentences.
    15·2 answers
  • What is the density of object C? Does it sink or float in water?
    14·2 answers
  • If you had .0451 moles of CaCl2, how many grams would you have?
    15·1 answer
  • Explain how you know it must be oxygen. Where
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!