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
gavmur [86]
3 years ago
11

Which of the following changes will always increase the efficiency of a thermodynamic engine? Choose all correct statements.

Physics
2 answers:
slava [35]3 years ago
6 0

Answer:

option (c)

Explanation:

The efficiency of the engine is given by

\eta =1-\frac{T_{c}}{T_{H}}

to increase the efficiency of the engine, the temperature of the cold reservoir should be decreased and thus the temperature of hot reservoir be increased.

So, decrease the ratio of Tc/TH.

option (C)

Ilya [14]3 years ago
5 0

Answer:B,C,D

Explanation:

Thermodynamic  efficiency is given by

\eta =1-\frac{T_C}{T-H}

\eta efficiency can be increased by Keeping _c constant and increasing T_H

Keeping T_H constant and decreasing T_c

by increasing \Delta T=T_H-T_c

by decreasing \frac{T_C}{T_H} ratio          

You might be interested in
The universal force that is effective over the longest distance between very massive objects like planets is
fenix001 [56]
The universal force that is effective over the longest distance between very massive objects like planets is Gravity
8 0
3 years ago
Find the mean of set values 12g 9g 13g 12g 20g 17g 15g
nalin [4]

{\huge{\boxed{\mathcal{\green{Answer}}}}} \\ \frac{12 + 9 + 13 + 12 + 20 + 17 + 15}{7}  \\  =  \frac{98}{7}  \\  = 14 \\ {\huge{\boxed{\mathcal{\green{Hope \: it \: Helps}}}}}

5 0
2 years ago
A spring is 20cm long is stretched to 25cm by a load of 50N. What will be its length when stretched by 100N. assuming that the e
IgorLugansk [536]

Answer:

Final Length = 30 cm

Explanation:

The relationship between the force applied on a string and its stretching length, within the elastic limit, is given by Hooke's Law:

F = kΔx

where,

F = Force applied

k = spring constant

Δx = change in length of spring

First, we find the spring constant of the spring. For this purpose, we have the following data:

F = 50 N

Δx = change in length = 25 cm  - 20 cm = 5 cm = 0.05 m

Therefore,

50 N = k(0.05 m)

k = 50 N/0.05 m

k = 1000 N/m

Now, we find the change in its length for F = 100 N:

100 N = (1000 N/m)Δx

Δx = (100 N)/(1000 N/m)

Δx = 0.1 m = 10 cm

but,

Δx = Final Length - Initial Length

10 cm = Final Length - 20 cm

Final Length = 10 cm + 20 cm

<u>Final Length = 30 cm</u>

6 0
3 years ago
How do you find the voltage of a section of a parallel circuit?
sergiy2304 [10]

Answer: Voltage is the same across each component of the parallel circuit. The sum of the currents through each path is equal to the total current that flows from the source. You can find total resistance in a Parallel circuit with the following formula: 1/Rt = 1/R1 + 1/R2 + 1/R3 +.

Hope this helps!

3 0
3 years ago
An object has more momentum if it has which of the following?
maks197457 [2]

Answer:

C.) A high velocity and Large mass.

Explanation:

Momentum of any object is defined by following formula

Here :  m = mass of object

v = velocity of object

now we know that since momentum is product of mass and velocity

So in order to have more momentum we need the value of this product to be more.  So this product will me large is both the physical quantity will be more in magnitude. So if mass is large and velocity will be more then the product of them will be large and hence the momentum of object will be more. Btw I had that question too.

6 0
3 years ago
Other questions:
  • there are 1000 g in every kilogram of a box has a mass of 483 g what is the mass of the box in kilogram
    14·1 answer
  • Which of the following does not affect the apparent brightness of a star.
    11·2 answers
  • The wires in a household lamp cord are typically 3.5 mm apart center to center and carry equal currents in opposite directions.
    5·1 answer
  • What will be the wavelength of a photon that is emitted when an electron of a hydrogen atom undergoes a transition from n=7 to n
    5·1 answer
  • Physical activity and exercise typically lead to
    7·2 answers
  • Saturn has a radius of about 9.0 earth radii, and a mass 95 times the Earth’s mass. Estimate the gravitational field on the surf
    15·2 answers
  • 12. What unit is used to describe the frequency of a wave?<br>​
    5·1 answer
  • Please help OwO .....
    8·1 answer
  • A body of mass 3.0kg moves with a velocity 10 m/s. calculate the momentum of the body​
    7·1 answer
  • a 1500 kg vehicle is traveling on a curved, icy road. the road is banked at an angle of 10.0 degrees and has a radius of curvatu
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!