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
Rus_ich [418]
2 years ago
8

3.7 kg of a saturated water vapor at 0.4 MPa is isothermally cooled until it is a saturated liquid. Calculate the amount of heat

rejected during this process in MJ. (Report your answer in 3 decimal places.)
Physics
1 answer:
kirill115 [55]2 years ago
5 0

Answer:

7.894 MJ

Explanation:

Given that:

The mass of the saturated water vapor = 3.7 kg

The pressure of the saturated water vapor = 0.4 MPa

From saturated properties of steam tables when the pressure is at 0.4 Mpa

The enthalpy in (kJ/kg);

hf = 604.7 kJ/kg

hg = 2738.1 kJ/kg

The rejected heat during this process is:

Q = m(hg - hf)

Q = 3.7(2738.1 - 604.7) kJ/kg

Q = 3.7(2133.4) kJ/kg

Q = 7893.58 kJ/kg

Q = 7.894 MJ

You might be interested in
Two motorcycles travel along a straight road heading due north. At t = 0 motorcycle 1 is at x = 50.0 m and moves with a constant
Dafna1 [17]

Answer:

Vf = 23 m/s

Explanation:

First we need to find the distance covered by the motorcycle 2 when it passes motorcycle 1. Using the uniform speed equation for motorcycle 1:

s₁ = v₁t₁

where,

s₁ = distance covered by motorcycle 1 = ?

v₁ = speed of motorcycle 1 = 6.5 m/s

t₁ = time = 10 s

Therefore,

s₁ = (6.5 m/s)(10 s)

s₁ = 65 m

Now, for the distance covered by motorcycle 2 at the meeting point. Since, the motorcycle started 50 m ahead of motorcycle 2. Therefore,

s₂ = s₁ + 50 m

s₂ = 65 m + 50 m

s₂ = 115 m

Now, using second equation of motion for motorcycle 2:

s₂ = Vi t + (1/2)at²

where,

Vi = initial velocity of motorcycle 2 = 0 m/s

Therefore,

115 m = (0 m/s)(10 s) + (1/2)(a)(10 s)²

a = 230 m/100 s²

a = 2.3 m/s²

Now, using 1st equation of motion:

Vf = Vi + at

Vf = 0 m/s + (2.3 m/s²)(10 s)

<u>Vf = 23 m/s</u>

5 0
3 years ago
A woman is standing at the rim of a nonuniform cylindrical horizontal platform initially at rest. The platform is free to rotate
rjkz [21]

Answer:

e

Explanation:

i took it myself and got it right

7 0
3 years ago
Out of hypothesis, theories and laws “can help predict future events”
Amanda [17]

Answer:

true

Explanation:

7 0
3 years ago
What is the method of heat transfer sunlight melts a wax crayon left outside.
Mars2501 [29]

Answer:

Hey Friend....

Explanation:

This is ur answer....

<h3><em>Transfer of energy by electromagnetic waves. Radiation doesn't require matter. Sunlight melting a wax crayon left outside is radiation.</em></h3><h3><em /></h3>

Hope it helps!

Brainliest pls!

Follow me! :)

5 0
2 years ago
The unit of kinetic energy is the _______. The unit of kinetic energy is the _______. hertz meter watt joule radian
Musya8 [376]

Answer:

joule

Explanation:

7 0
2 years ago
Other questions:
  • Formula for displacement
    15·1 answer
  • how to do this A young vandal wishes to hit a truck traveling at a constant speed of 20m/s with a water balloon. If the vandal i
    14·1 answer
  • Two skaters skate toward each other, each moving at 3.3 m/s. Their lines of motion are separated by a perpendicular distance of
    14·1 answer
  • A wooden box is pushed with 100 N towards North
    8·1 answer
  • " when striking, the pike, a predatory fish, can accelerate from rest to a speed of 4.0 m/s in 0.11 s."
    5·1 answer
  • After the cart bounces, how far does it roll back up the ramp?
    12·1 answer
  • Hawaii is located over a tectonic plate. Because of this, Hawaii is MOST LIKELY to experience A) erosion. B) tornadoes. C) hurri
    14·2 answers
  • High-speed stroboscopic photographs show that the head of a 260-g golf club is traveling at 51 m/s just before it strikes a 46-g
    6·1 answer
  • 11. A 2.5-kg block slides down a 25o inclined plane with a constant acceleration. The block starts from rest at the top. At the
    7·1 answer
  • We can see light move with our bare eyes true or false​
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!