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
Oksana_A [137]
3 years ago
11

A Carnot heat engine uses a hot reservoir consisting of a large amount of boiling water and a cold reservoir consisting of a lar

ge tub of ice and water. In 5 minutes of operation, the heat rejected by the engine melts 0.0400 kg of ice. During this time, how much work W is performed by the engine?
Physics
2 answers:
horrorfan [7]3 years ago
7 0

Answer:

W= 4.89 KJ

Explanation:

Lets take

temperature of hot water T₁ = 100⁰C

T₁ = 373 K

Temperature of cold ice T₂= 0⁰C

T₂ = 273 K

The latent heat of ice LH= 334 KJ

The heat rejected by the engine Q= m .LH

Q₂= 0.04 x 334

Q₂= 13.36 KJ

Heat gain by engine = Q₁

For Carnot engine

Q_1=\dfrac{T_1}{T_2}Q_2

Q_1=\dfrac{373}{273}\times 13.36

Q₁  = 18.25 KJ

The work W= Q₁  - Q₂

W= 18.25 - 13.36 KJ

W= 4.89 KJ

vodomira [7]3 years ago
3 0

Answer:

W = 4893.77 J

Explanation:

given,

mass of the ice = 0.04 Kg

time of operation = 5 minutes

Heat delivered  =

  Q_c = m_c \Delta H_f

  Δ H_f is latent heat of fusion of ice = 334 x 10³ J/Kg

   Q_c = 0.04 \times 334 \times 10^3

  Q_c = 13360\ J

Work done

W = Q_H - Q_C

Q_H= (\dfrac{T_H}{T_C})Q_C

W= (\dfrac{T_H}{T_C}-1)Q_C

W= (\dfrac{373}{273}-1)\times 13360

W = 4893.77 J

You might be interested in
How to divide electrons into energy levels?
lara31 [8.8K]
In Bohr's atomic model, he proposed that the electrons are revolving around the nucleus in their respective orbitals. There are 5 kinds of orbitals: the s, p, d and f orbitals. They differ in their energy level, shape and number of subshells. Each subshell holds two oppositely spinning electrons. The s has 1 subshell, p has 3, d has 5 and f has 7. You arrange the orbitals into energy levels just like how you write them in an electronic configuration.

In the first energy level, you only have one 1s orbital. In the second energy level, you have one 2s and one 2p orbital, the 2p having more energy than 2s. The other levels are shown in the picture.

6 0
3 years ago
Question 2 of 5 Which two statements are true for both compounds and mixtures? A. They can be separated into two or more element
Alekssandra [29.7K]

Answer:

D and A

I'm not sure about A lol

7 0
2 years ago
g An astronaut must journey to a distant planet, which is 189 light-years from Earth. What speed will be necessary if the astron
Butoxors [25]

Answer:

The value is v  =  2.999 *10^{8} \  m/s

Explanation:

From the question we are told that

   The time taken to travel to the planet from earth is t = 189 \ light-years

    The  time to be spent on the ship is  t_{s} =  12 \  years

Generally speed can be obtained using the mathematical relation represented below

       t_s  =  2 * t *  \sqrt{1 -  \frac{v^2}{c^2 } }

The 2 in the equation show that the trip is a round trip i.e going and coming back

=>    12 =  2 * 189 *  \sqrt{1 -  \frac{v^2}{(3.0*10^{8})^2 } }

=>     v  =  2.999 *10^{8} \  m/s

5 0
3 years ago
Formula for working maximum velocity? ​
Varvara68 [4.7K]

Answer:

v=Aω.

Explanation:

hope this helps you!!

8 0
3 years ago
Read 2 more answers
HELP MEEEEEEEE PLEASEEEE
Lemur [1.5K]

Answer:

B Explain why the relationship between force and time is important to a helmet designer.

During a collision, a skater will suddenly come to a complete stop. This is a foam of acceleration. A helmet can change the amount of

hope you get a good grade

5 0
3 years ago
Other questions:
  • The speed of a light wave in a certain transparent material is 0.701 times its speed in vacuum, which is 3.00×108 m/s . When yel
    10·1 answer
  • Matter is anything that...
    11·1 answer
  • Nxn xnnmjksaccnsaxchscnshcs
    6·1 answer
  • What is the closest star that could go supernova?
    11·1 answer
  • The drag force pushes opposite your motion as you ride a bicycle. If you double your speed, what happens to the magnitude of the
    9·1 answer
  • Which of the following is an accurate comparison of the weight of an astronaut on the moon and the Earth? The weight of the astr
    8·2 answers
  • During a collision, a bus runs into a skateboarder inelastically. If the mass of the skateboarders is 70 kg and is moving at 12
    8·1 answer
  • A light ray in medium 1 striking a boundary at an angle of theta Subscript 1 Baseline. In medium 2 is a second light ray that is
    15·1 answer
  • The momentum of a 3000 kg truck is 6.36 x 104 kg·m/s. At what speed is the truck traveling? m/s
    8·1 answer
  • The less mass an object has, the --- its gravitational f
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!