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
Vladimir79 [104]
3 years ago
9

What temperature is required to transfer waste heat to the environment for a heat engine to be 100 percent efficient?

Physics
2 answers:
OLEGan [10]3 years ago
6 0
This can be seen as a trick question because heat engines can typically never be 100 percent efficient. This is due to the presence of inefficiencies such as friction and heat loss to the environment. Even the best heat engines can only go up to around 50% efficiency.
nirvana33 [79]3 years ago
6 0

Answer:

An infinite temperature

Explanation:

The efficiency of an engine is defined as:

\eta=1 -\frac{T_C}{T_H}

where

T_H is the temperature at which heat enters the engine

T_C is the temperature of the environment, to which the engine exhausts heat

From the formula, we see that for an engine to be 100% efficient, the fraction

\frac{T_C}{T_H}

must be equal to zero. Since the value of T_C is never zero (the temperature is expressed in Kelvin, and the temperature of the environment can never be exactly 0 K), the only possibility for that to occur is that the temperature at which heat enters the engine (T_H) is infinite, so that this fraction becomes zero and the efficiency becomes 1.

You might be interested in
Wood is an example of a translucent material.<br> True<br> False
Svetradugi [14.3K]
False, wood is a solid structure that is not see through
3 0
3 years ago
Is an atom with one valence electron more reactive than an atom with two electrone? ​
andrey2020 [161]

Answer:

An atom with a closed shell of valence electrons (corresponding to an electron configuration s2p6) tends to be chemically inert. An atom with one or two valence electrons more than a closed shell is highly reactive, because the extra valence electrons are easily removed to form a positive ion.Explanation:

7 0
3 years ago
How many Newtons of force does it take to move a 53 kilogram object?
Sidana [21]
519.75N

explanation: good luck on whatever assignment
3 0
3 years ago
A chemical reaction that has the general formula of AB + C → CB + A is best classified as a reaction.
MissTica

Answer:

Single replacement

Explanation:

A reaction in which one element replaces a similar element is called single replacement.  In this case, C is replacing A.

7 0
3 years ago
Read 2 more answers
Which layer of the earth can be seen from the open hole
umka21 [38]

Answer:

the inner core

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • charge, q1 =5.00μC, is at the origin, a second charge, q2= -3μC, is on the x-axis 0.800m from the origin. find the electric fiel
    12·1 answer
  • Derivative of arcsin(cos(2x))<br> is this chain rule?
    14·1 answer
  • A photon has momentum of magnitude 8.30×10−28 kg⋅m/s . Part APart complete What is the energy of this photon? Give your answer i
    9·1 answer
  • You are 15.0m from the source of a sound. At that distance, you hear it at a sound level of 20.0dB. How close must you move to t
    15·2 answers
  • To lift an objet weighing 21,000N, how much force is needed on a piston with an area of 0.060 meters squared if the platform bei
    8·1 answer
  • A ball thrown straight up climbs for 3.0 sec before falling. Neglecting air resistance, with what velocity was the ball thrown?
    8·1 answer
  • What is the sound intensity level in a car when the sound intensity is 0.525 μW/m2 ? Use I0 = 1.00×10−12 W/m2 for the reference
    8·1 answer
  • An eagle flying at 15 m/s has 600 J of kinetic energy. About how much is the eagles mass?
    10·1 answer
  • CAN SOMEONE TELL ME THE answer for this ?
    15·2 answers
  • The provided text reads: "a typical lightning bolt may transfer 10^20 electrons in a fraction of a second, developing a peak cur
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!