Imagine a Carnot engine is designed to have a cold reservoir of 17° C and a hot reservoir at 570° C.
i. What is the efficiency of this engine?
ii. Could we have a 100% efficient Carnot engine? Explain.

Answers

Answer 1

i. The efficiency of this engine is approximately 65.6%.

ii. No, we could not have a 100% efficient Carnot engine because that would require a cold reservoir at absolute zero (0 K) which is impossible to reach.

i. To calculate the efficiency of a Carnot engine, use the formula:

Efficiency = 1 - (Tc/Th)

where Tc is the temperature of the cold reservoir (in Kelvin) and Th is the temperature of the hot reservoir (in Kelvin). First, convert the temperatures to Kelvin:

Tc = 17°C + 273.15 = 290.15 K
Th = 570°C + 273.15 = 843.15 K

Now, plug these values into the efficiency formula:

Efficiency = 1 - (290.15/843.15) = 1 - 0.344 ≈ 0.656

The efficiency of this Carnot engine is approximately 65.6%.

ii. A 100% efficient Carnot engine is theoretically impossible, as it would require a cold reservoir at absolute zero (0 K). The Second Law of Thermodynamics states that it's impossible to reach absolute zero; hence, a Carnot engine can never be 100% efficient.

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Related Questions

Energy is defined as ____________.

The ability of an object to produce a change in the environment or itself

motion

the effort required to perform work

power

Answers

Answer:

The effort required to perform work

Explanation:

plsss anyone help I BEG. its not that hard im just lazy and don't feel like thinking3

Answers

Answer:

Well I think you should think

the force required to lift a load of 800 Newton by using a Lever having a mechanical advantage of 1.6 is​

Answers

Answer:force required to lift the load = 500N

Explanation:

Mechanical advantage for a lever is given by the formulae

= force output/force input

or

Mechanical Advantage = Load / Effort

where

Force output  / Load= 800 N

mechanical advantage = 1.6

Force input / Effort =??

Force input=  Force output /Mechanical advantage

= 800N / 1.6

=500N

OR

Effort = Load/ Mechanical Advantage = 800/ 1.6 = 500N

Motion Quiz 1
Part I. Vocabulary (5 points each)
1. The location of an object.
2. A change in the position of an object in reference to a starting point. 3. A change in the position of an object that includes distance and direction. 4. North, south, right, and down are all examples of ________. 5. How fast or slow something moves over a given distance per unit of time. 6. A unit of measurement for time.
Part II. Multiple Choice (10 points each)
Direction
Displacement Meters
Minutes
Motion
Position
Speed

A toy robot moved from a starting point, traveling in a straight line at different speeds and then turning around and returning to the starting point at different speeds.

7. What is the total distance that the toy robot traveled?
A. 12 m
B. 24 m
C. 48 m
D. 96 m
8. A cyclist travels 3 km north in 25 minutes. What does this information describe?
A. mass
B. force
C. motion
D. gravity
9. A book is lying on a seat in a car that is moving at 50 kilometers per hour (km/h). The driver says that the book is not moving. An outside observer says the book is moving at 50 km/h because it is in the car. Which is the most logical conclusion for these two statements?
A. Motion is detected only if the car accelerates and is measured by the observer.
B. Motion is absolute, and the driver is incorrect saying that the book has no motion.
C. Motion is relative to a given frame of reference, and both the driver and observer are correct.
D. Motion is constantly changing so neither person’s statement will be correct when the car slows down.
10. Which measurement describes the speed of a rubber ball?
A. 5 cm
B. 10 m/s
C. 15 newtons
D. 50 grams
11. A change in the position of an object as time changes best describes
A. direction.
B. waves.
C. motion.
D. frequency.
12. A school bus moves past a parked car at a speed of 30 km/h. Which of the following best describes the observation made by a passenger on the bus?
A. The car appears to be moving 30 km/h in the same direction as the bus.
B. The car appears to be moving 30 km/h in the opposite direction of the bus. C. The car appears to be moving 15 km/h in the same direction as the bus.
D. The car appears to be moving 15 km/h in the opposite direction of the bus.
13. Calculate the speed when the distance travelled is 800 km and the time is 40 seconds. A. 200 km/sec
B. 320 m/sec
C. 20 km/sec
D. 32 m/sec

Answers

Do you still need help with this question

Two spheres are moving towards each other. Which of the following is the
best evidence that the spheres have transferred energy from one to the other?

A.The friction of the surface decreases

B.Gravity is always acting on the spheres

C.The motion of the sphere changes

Or

D.Both of the spheres have the same mass

Answers

Answer:

D

Explanation:

If they are both moving at the same speed then its D.

One of the largest planes ever to fly, and the largest to fly frequently, is
the Ukrainian-built Antonov An-124 Ruslan. Its wingspan is 73.2 m
and its length is 69.2 m. The gravitational potential energy associated
with the plane at an altitude of 1.45 km is 3.36 x 10^9 J. What is the airpanes mass

Show work pls :)

Answers

The gravitational potential energy associated with the plane is 2.36 x [tex]10^{5}[/tex] J

What is gravitational potential energy?

Gravitational potential energy is energy an object possesses because of its position in a gravitational field.

It is given by P.E = mgh

where m = mass

g= acceleration due to gravity

h = height of the object

Here,

h = 1.45km  = 1450 m

P.E = 3.36 x [tex]10^{9}[/tex] J

g = 9.8m/[tex]s^{2}[/tex]

therefore, m = P.E/ gh = (3.36 x [tex]10^{9}[/tex]s J)/ 9.8 x 1450

m = 2.36 x [tex]10^{5}[/tex]

Hence mass of the airplane is 2.36 x [tex]10^{5}[/tex]

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Select the correct answer.
Which pair of atoms has the highest electronegativity difference?
OA.
H-S
B.
H-Cl
o c.
N-H
OD.
О – Н
O E.
C-H

Answers

Answer:O – H

Explanation:

Importance of Forest ​

Answers

Answer:

to help keep fresh air

Explanation:

To produce oxygen and protect oxygen

Complete the sentence. Friction always ____________

a. helps the motion

b. opposes the motion

c. both of these

d. none of these

Answers

Answer:

B- Opposes the motion

Explanation:

When two object touches each other. friction acts in a opposite direction to the motion of the object

B. Opposes the motion.

A marble rolling across a flat surface will not roll forever. This is due to friction. The marble rubs against the flat surface, slowing down until it finally stops.

An object spins with an angular momentum of 8.9 kg⋅m2 /s. A torque on the object causes it to slow to a stop in 5.2 s. What was the angular impulse on the object? What was the average torque on it? Analyze and Sketch the Problem

List Knowns and Unknowns Knowns Unknowns Li = ____________________ Lf = ________________ _____________ = ? ∆t = _________________ _____________ = ? SOLVE FOR THE UNKNOWNS a. Determine the angular impulse from the change in angular momentum b. Apply the impulse-momentum theorem to determine the Torque EVALUATE THE ANSWER Is the unit of torque correct? ______________________________________________________________ Is the magnitude of the torque realistic? _____________________________________________________

Answers

Answer:

Explanation:

Li = 8.9 kg m² /s , Lf = 0

Time = Δt = 5.2 s

Angular impulse = change in angular momentum = Li - Lf

= 8.9 - 0 = 8.9 kg.m²/s .

Average torque = angular impulse / time

= 8.9 / 5.2 = 1.711  kg m² / s²

Li = 8.9 kg m² /s , Lf = 0

Δt = 5.2 s

unit of torque = force x distance = mass x acceleration x distance

= kg . m /s² x m

= kg m² / s²

This tasty snack starts as a kernel and is “popped” then
covered in salt, butter, caramel, peanuts, you name it.
Through thermal energy we've learned to heat things, you
could use conduction, convection and/or radiation. Describe
1 cooking option in detail including whether it is convection,
conduction or radiation. Must be at least 2 sentences.

Answers

Popcorn can be popped by either of the three forms of heat transfer:

Conduction in a pan with hot oil on a stove element.

Convection by an air popper and warm air rising over a heating element... no direct contact with heat source.

Radiation is what occurs in a microwave. Invisible radiant heat activates water molecules in the popcorn.

All the above heat the kernel over 100 Celsius. Water vaporizes/boils (latent heat) and erupts through the kernel.

Mmmm popcorn watch out for the lipids (fat in the oil and butter)

A tractor pulls a 1,000 kg wagon with a force of 4,000N. What is the wagon’s acceleration in m/s2? *

Answers

Answer:

4m/s^2

Explanation:

acceleration=force/mass

therefore a=4000/1000

=4m/s^2

What is the kinetic energy of a 5kg ball that is rolling 3m/s?

Answers

Answer:

22.5

Explanation:

As the mass is 5 kg,velocity is 3m/s so the derivation use for kinetic energy is 1÷2 mv*2 . By this derivation we will find out the kinetic energy

plzz helpppp meee!!!!

A farmer cannot get his cow to move without help. The cow has a mass of 425 kg. He returns with some neighbors, and they are able to exert a net force of 900 N on the cow. What is its acceleration?​

Answers

A=f/m
A=900/425
A=2.18

To determine acceleration you divide the force by the mass.

Answer:

hhh

Explanation:

the organelles are giving their job description to you can you identify which organelle are they? write your answers in your answer sheet.
1. Hi! My responsibility is to add stability and protection to plant cells. What am I?
2. Hi! produce proteins inside the cell. What am I ?
3. Hello! I have a green pigment called the clorophyll. I also absorb solar energy to do the process of photosynthesis. What am I?
4. Good morning po! my work is to store food materials and excretes waste materials. I take a large space on plants. I make the leaves of plants fresh. what am i?
5. Hi! All organelles are embedded in me. I am a "jelly- like" substance. What am I?
Please real answer ​

Answers

1. cell wall?

2. ribosomes?

3. chloroplast

4. vacuoles

5. cytoplasm

PlEaSe HeLp MeE
What is the gpe of a rock weighing 100N that is sitting on top pf a hill 300 m high?

Answers

Answer:

Gpe = 30000J

Explanation:

Given the following data;

Weight = 100N

Height = 300m

To find the gravitational potential energy (gpe);

Gravitational potential energy can be defined as an energy possessed by an object or body due to its position above the earth surface.

Mathematically, potential energy is given by the formula;

[tex] G.P.E = mgh[/tex]

Where,

G.P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

Gpe = mgh

But weight = mg = 100N

Substituting into the equation, we have:

Gpe = 100*300

Gpe = 30000J

Una pieza de platino metalico con densidad 21.5 g/cm3 tiene un volumen de 4.49 cm3. Cual es su masa

Answers

Answer:

m = 96.53 grams

Explanation:

Given that,

The density of metallic platinum, d = 21.5 g/cm³

Volume, V = 4.49 cm³

We need to find the mass. Let it is m. We know that the density is equal to the mass per unit volume. So,

[tex]d=\dfrac{m}{V}\\\\m=d\times V\\\\m=21.5\times 4.49\\\\m=96.53\ g[/tex]

So, the required mass is 96.53 grams.

What is the main reason people and bears slip and fall on ice, be careful when outside in the snow/ice.

Answers

Answer:

Both ice and snow have a lower coefficient of friction in comparison with grass, wood or pavement.

Explanation:

The main reason why people and bears, slip and fall on ice/snow is that both ice and snow have a lower coefficient of friction in comparison with grass, wood or pavement. We present below a comparative chart of coefficients of friction associated with different materials:

Material       Coefficient of Friction - Static                  

Ice/Snow                   0.05 - 0.3

Wood                          0.2 - 0.6

Asphalt                        0.5 - 0.7

Grass                            0.3 - 0.5

calculate the change in gravitational potential energy of a stone of mass 0.55 kg as it falls through a distance of 2.7 m. ignore air resistance (mention formula)

Answers

Answer:

14, 85 J

Explanation:

The formula of potential Energy (P.E.) is

P.E. = m * g * h, where m is the mass in kilograms, g is the acceleration due to gravity (about 10 m / [tex]s^{2}[/tex] at the surface of the earth) and h is the height in meters.

Here P.E. is 0,55 kg * 10 m/s * 2,7 m = 14, 85 J

Wave Properties
With the help of their science teacher, Kaden and Mariam made a machine that can move a slinky back and forth. This motion
creates a fast-moving wave in the slinky. The image below is a model of a wave that is generated by the machine. The frequency of
the wave modeled in the image is 4 Hz.
3 m
What is the speed of the wave?
OA. 24 m/s
ОВ.
1.25 m/s
OC.
0.75 m/s
OD
12 m/s

Answers

the wave has a speed of 12 m/s.

Explanation:

Speed is directly proportional to wavelength and frequency. The wave has a frequency of 4 Hz. One Hertz (Hz) is equal to one cycle per second. The image shows that the wave has a wavelength of 3 m. Using the given speed and frequency, the wavelength can be calculated as shown below.

speed= wave length x frequency

speed = 3m x 4Hz

speed = 12m m/6

Two photographers are competing for business in town. Andrea uses only film photography and Keira uses only digital photography. Keira claims that the digital technology is superior, and her advertisement claims that the images can be stored, shared, and copied more easily. They can even be sent long distances using a series of wave pulses to transmit the information. Andrea replies that digital images can be stolen and altered more easily.
Do the advantages outweigh the disadvantages, or do both sides have valid points? Support your answer with at least three reasons

Answers

There is no right or wrong answer, your teacher wants you to support your own answer with points. As long as the reasons make logical sense you are fine.

I think they both have valid points. Their replies are both true, but from a buyer's perspective who would you purchase services from? You would get different answers depending on who you ask.

If you choose to go old school, obviously you get an actual photo that can be stored physically. This means it is a memory that can be preserved, and it might feel more nostalgic being able to touch the photo.

On the other hand, a digitally stored photo can be altered (photoshop), but it is forever as long as the internet still exists. A physical photo would fade with time, which doesn't happen with a digital photo.

It is definitely easier to argue that digital photography has more advantages (they do, it is why nobody uses film anymore)

Points you can consider:

Can be transferred to the other side of the world instantly

Ability to make copies and print as many photos as you want

Can be stored on cloud/devices and be like that forever

Compare them with film photography to give a more solid response.

A 9Ω resistance is cut into three equal parts and connected in parallel. Find the equivalent resistance of the combination.​

Answers

Answer:

the ans i 1 ohm

Explanation:

if i cut a resistor of 9 ohm into 3 equal parts then each resistor will have a resistance of 3 ohm and if they are in parallel combination the net resistance will be R

so 1/R=1/R1+1/R2+1/R3

     1/R=1/3+1/3+1/3

      R=1

what is the unit scientist use to measure energy?

Answers

answer:

scientists use a measurement called BTU to measure energy


what is the wavelength of the wave

Answers

Explanation:

it is equal to the speed (v) of a wave train in a medium divided by its frequency (f): λ = v/f. Waves of different wavelengths.

Answer:

It is measured in the direction of the wave. Description: Wavelength is the distance from one crest to another, or from one trough to another, of a wave (which may be an electromagnetic wave, a sound wave, or any other wave).

Please help with this !!!!!!

Answers

Answer:

answer is d from my guess

How many total molecules are present in the formula below
2H2O

Answers

There are 4 in there I believe

I'm guessing 6.

the coefficient of two turns our hydrogen into 4 and our oxygen into 2 which makes a total of 6 molecules.

What is potential energy?

Answers

the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors

give three example what are the aims of each team in playing basketball?​

Answers

Answer:

The main objective of basketball is to make a goal and score points.Each team should not only try to make a goal and prevent the opposite team from taking control of the ball, but should also try to protect the basket in their court and prevent the opponent from making a goal.

hope that helps..

which two criteria are least important for engineers to consider when developing a process to produce an important chemical

Answers

Answer:

Chemical engineering is a multi-disciplinary branch of engineering that combines natural and experimental sciences such as chemistry and physics, along with life sciences such as biology, microbiology and biochemistryplus mathematics and economics to design, develop, produce, transform, transport, operate

Explanation:

Answer:

A. the process needs to produce significant amounts of ammonia

C. the process needs to be able to be performed safely

Explanation:

a p e x

what type force does this depict?

Answers

Answer:

c. gravitational force

Explanation:

Other Questions
A lubricated power screw is used to lower an 800 N load. The screw has a major diameter of 28 mm, a mean diameter of 25.5 mm, and a lead of 5 mm. The coefficient of friction is 0.15 . Neglecting collar friction, what is most nearly the torque required to lower the load? a) 1.7 N.m b) 0.9 N.m c) 10 Nm d) 25.4 N.m 4. After curing for several days at 20 C, concrete spec- imens were exposed to temperatures of either -8C or 15 C for 28 days, at which time their strengths were determined. The n1 9 strength measurements at -8C resulted in X1 62.01 and S 3.14, and the n2 9 strength measurements at 15 C resulted in X2 67.38 and S2 4.92. Is there evidence that temperature has an effect on the strength of new concrete? (a) State the null and alternative hypotheses. Is the test statistic in (9.2.14) appropriate for this data? Justify your answer (b) State which statistic you will use, test at level a 0.1 and compute the p-value. What assumptions, if any, are needed for the validity of this test procedure? (c) Construct a 90% CI for the difference in the two means (d) Use cs read table("Concr Strength 2s.Data.trt", h der 3T) to import the data set into the R data frame cs, then use R commands to perform the test and construct the CI specified in parts (b) and (c). How could you free a protein from a GPI anchor? You may choose more than one answer. 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Aidez moi remplir cette plan danalyse svp!Consigne: Dmontrez que dans ses deux nouvelles, le parapluie et Dcor! , Maupassant nous livre un regard trs ngatif sur la bourgeoisie.PLAN DE L'ANALYSEIDE DIRECTRICE : Dans ses deux nouvelles, le parapluie et Dcor! , Maupassant nous livre un regard trs ngatif sur la bourgeoisie.1. IDE PRINCIPALE:1.1 IDE SECONDAIRE:1.2 IDE SECONDAIRE:2. IDE PRINCIPALE:2.1 IDE SECONDAIRE:2.2 IDE SECONDAIRE: dr. sheffield has found that forcing his patients to take medication has caused a problem with being able to treat them effectively. this problem is likely to be that ____. Select the correct text in the passage. Which line in the excerpt is an example of an allusion that shows that the people of Latin America have experienced a rich culture for a long time? The following excerpt adapted from the poem "To Roosevelt" was written by the Nicaraguan poet Rubn Daro in 1907. Daro wrote the poem in response to the actions of US President Theodore Roosevelt. During his presidency, Roosevelt increased the role of the United States in Latin America. You think that life is a fire, that progress is eruption and into whatever bones you shoot, you hit the future. The United States is strong and big. When it shakes, there is a deep tremor through the enormous vertebrae of the Andes. 1 But our America, which had poets from the ancient times, which consulted the stars that knew Atlantis,2 which has lived since the old times on the very light of this world, it lives, And it dreams. And it loves, and it vibrates; and she is the daughter of the Sun! Andes: a large mountain range in South America Atlantis: an imaginary civilization in ancient Greek writings that was believed to be a perfect society1And it dreams. And it loves, and it vibrates; and she is the daughter of the Sun!2which consulted the stars that knew Atlantis,23through the enormous vertebrae of the Andes. 1 Which of the enzymes required for DNA replication within a cell are not include in a PCR (polymerase chain reaction) mix because the denaturation step achieves the same goal? [Select] Helicase and Topoisomerase Ligase and Helicase DNA polymerase and Topoisomerase B. What does PCR use instead of enzymes? [Select] [Select] PCR uses pH PCR uses high temperature PCR uses low temperature Question 4 0.5 pts Below is a list of materials need for PCR. What key ingredient is missing? DNA polymerase (Taq or other) Forward and reverse primers Template DNA Buffer solution O A. dNTPs B. Primase C. Telomeres D.mRNA the acquisition of chemical substances by organisms for use as in cellular metabolism, growth, energy, and other functions is presented here are long-term liability items for tamarisk, inc. at december 31, 2022. bonds payable (due 2026) $750,000 notes payable (due 2024) 80,000 discount on bonds payable 39,000 XYZ Co is considering a major expansion program that has been proposed by the companys information technology group. Before proceeding with the expansion, the company must estimate its weighted average cost of capital. You are an assistant to the CFO of the company and your first task is to estimate XYZ Cos cost of capital. The CFO has provided you with the following data, which he believes may be relevant to your task (all the market data are current). The firms tax rate is 40%. The market data on XYZ Cos securities is:Debt50,000 6% coupon bonds outstanding (bond A), with 25 years to maturity selling at $950; the bonds par value is $1,000 and they make semiannual payments.60,000 5.5% coupon bonds outstanding (bond B), with 20 years to maturity selling at $1000; the bonds par value is $1,000 and they make semiannual payments.Common stock1,250,000 outstanding shares, selling for $95 per share; XYZ Co just paid a dividend of $5 per share and is expected to increase its future dividends at a constant rate of 6%.Answer the following questions and SHOW ALL FORMULAS AND CALCULATIONS (if using a financial calculator show all the entries).a. (4 points) What is XYZ Cos cost of debt?b. (2 points) What is XYZ Cos cost of equity?c. (3 points) What is XYZ Cos cost of capital? revealing intimate aspects of one's self to others to help maintain a relationship iis an example of What is the quotient of the expression the quantity 28 times a to the fourth power times b plus 4 times a to the second power times b to the second power minus 12 times a times b end quantity divided by the quantity 4 a times b end quantity? 7a3 + ab + 3 7a3 + ab 3 7a3 + 4ab + 8 7a3 + 4ab 8 If Joel earns a 10% after-tax rate of return, $10,000 received in two years is worth how much today (rounded)?A. $10,000B. $9,090C. $8,260D. $11,000E. None of these $10,000 x .826 (Discount Factor, 2 years, 10%) = $8,260. Greater task specialization is afforded by what form of organization? Multiple Choice a. line-and-staff structures or flat structures b. departmental structures, unitary structures, or U-forms c. divisional structures or M.forms d. business-level structures or F-forms e. composite structures or combination structures