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
astraxan [27]
3 years ago
12

An internal combustion engine uses fuel, of energy content 44.4 MJ/kg, at a rate of 5 kg/h. If the efficiency is 28%, determine

the power output and the rate of heat rejection.
Physics
1 answer:
Alika [10]3 years ago
8 0
Efficiency =  Power Output / Power Input

Power Input = Rate of Energy input = 44.4 MJ/kg * 5 kg/h

 = 222 MJ/h

But 1 hour = 3600seconds

222 MJ/h = 222 MJ/3600s =  0.061667 MW              J/s = Watts

Power input = 0.061667 MW = 61 667 W

From  Efficiency =  Power Output / Power Input

   28% =  Power Output / 61667

   Power Output = 0.28 * 61667

   Power Output = 17266.76 W

    Power Output ≈ 17 267 W

   Rate of heat rejection = Power Input - Power Output

                                   =  61667 - 17267 = 44400 W

   Rate of heat rejection = 44 400W.
You might be interested in
Please show work with the answer and thank you
Alika [10]

Answer:

its your homework

Explanation:

you aren't getting any free answers out of me because it sounds like your trying to be smart your welcome

(Not smarter than me)

7 0
3 years ago
Wts the average velocity​
Alexeev081 [22]

Answer:

2.11 m/s

Explanation:

V=disp/time

V=(0.52m+3.7m)/(2)

V=4.22/2

V=2.11 m/s

5 0
3 years ago
A Cephied is a star that belongs to a class of yellow supergiant pulsating stars; these stars vary periodically in brightness, a
mihalych1998 [28]

Luminosities

Thanks to this relationship between period and luminosity, a Cepheid provide a practical and accurate method to evaluate their absolute magnitude. Once this is known, it is possible to know the distance of the Cepheid, calculating the difference with respect to the apparent magnitude.

4 0
4 years ago
The function H(t) = -16t^2 + vt + s shows the height H (t), in feet, of a projectile launched vertically from s feet above the g
Reptile [31]
<span>H(t) = -16t^2 + vt + s
</span><span>Part A:
</span>Using the given data:

H(t)= -16*t² + 60*t + 82;

Part B:
Put H(t)=0
0<span>= -16*t² + 60*t + 82;</span>
Use the quadratic formula to find t.
See the attachment...'t' is replaced with 'x'.

3 0
3 years ago
An embryo develops inside the ________.​
irina1246 [14]
Development of the Embryo. The next stage in development is the embryo, which develops within the amniotic sac, under the lining of the uterus on one side. This stage is characterized by the formation of most internal organs and external body structures.
6 0
3 years ago
Other questions:
  • A 1200 kg car is moving at 5.0 m/s east. it strikes an 1800 kg car at rest. the cars have an elastic collision and move in the e
    10·1 answer
  • A fatigue test was conducted in which the mean stress was 50 MPa (7250 psi) and the stress amplitude was 225 MPa (32,625 psi).
    13·1 answer
  • Acceleration can be best described as:
    6·1 answer
  • In a later chapter we will be able to show, under certain assumptions, that the velocity v(t) of a falling raindrop at time t is
    6·1 answer
  • Hey guys, I don't know what this is. Any help?
    6·1 answer
  • Yes ples omggggggggg
    14·2 answers
  • A pizza delivery person drives 3 miles North then 5 miles West and then 3 miles South to deliver a pizza. What is the person's d
    14·2 answers
  • A truck is traveling at a speed of 50 km/h. What happens when the truck slows down?
    11·1 answer
  • Glucose solution is administered to a patient in a hospital. The density of the solution is 1.308 kg/l. If the blood pressure in
    10·1 answer
  • A conductor carrying a current I = 15.0 A is directed along the positive x axis and perpendicular to a uniform magnetic field. A
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!