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
djyliett [7]
3 years ago
15

A closed system of mass 10 kg undergoes a process during which there is energy transfer by work from the system of 0.147 kJ per

kg, an elevation decrease of 50 m, and an increase in velocity from 15 m/s to 30 m/s. The specific internal energy decreases by 5 kJ/kg and the acceleration of gravity is constant at 9.7 m/s2. Determine the heat transfer for the process, in kJ.
Physics
1 answer:
anyanavicka [17]3 years ago
5 0

Answer:-50.005 kJ

Explanation:

Given

mass of system =10 kg

work done=0.147 kJ/kg

Change in elevation(\Delta h)=-50 m

initial velocity (v_1)=15 m/s

Final Velocity(v_2)=30 m/s

Specific internal Energy(\Delta U)=-5 kJ/kg

from first Law of thermodynamics

Q-W=\Delta H

\Delta H=\Delta KE+ \Delta PE +\Delta U

where KE= kinetic energy

PE=potential energy

U=internal Energy

\Delta H=\frac{m(v_2^2-v_1^2)}{2}+mg(\Delta h)+\Delta U

Q=W+\Delta KE+ \Delta PE +\Delta U

Q=0.147\times 10+\frac{10\cdot (30^2-15^2)}{2}+10\cdot 9.81\cdot (-5)-5\times 10

Q=1.47+3.375-4.850-50

Q=-50.005 kJ

You might be interested in
The y component of a vector is 36, and the angle between the vector and the x axis is 27 what is the magnitude of the vector
xz_007 [3.2K]

Answer:

Magnitude of Vector = 79.3

Explanation:

When a vector is resolved into its rectangular components, it forms two vector components. These components  are named as x-component and y-component, they are calculated by the following formulae:

x-component of vector = (Magnitude of Vector)(Cos θ)

y-component of vector = (Magnitude of Vector)(Sin θ)

where,

θ = angle of the vector with x-axis = 27°

Therefore, using the values in the equation of y-component, we get:

36 = (Magnitude of Vector)(Sin 27°)

Magnitude of Vector = 36/Sin 27°

<u>Magnitude of Vector = 79.3</u>

3 0
2 years ago
What are the two parts of a force pair?
iragen [17]

These two forces are called action and reaction forces and are the subject of Newton's third law of motion.

<em>Have a luvely day!</em>

8 0
2 years ago
The bullet's horizontal velocity and vertical velocity vectors do not affect each other and are known as
lisabon 2012 [21]
Values in physics that do not affect each other are considered Independent values
8 0
2 years ago
Read 2 more answers
If you have an effusive personality, then it __________ of you. motor oil will __________ across the gravel if it spills out of
erica [24]
The first answer in the blank is pours out of you, the second answer in the space provided is diffuse. It is because a person who has an effusive personality will likely pour out his or her emotions while the motor oil will likely diffuse if this has been spilled out of the can.
6 0
3 years ago
which component of a motor causes the magnetic field produced by the coil to regularly reverse and therefore always be repelled
gavmur [86]
Spark altnator spark altnator spark altnator spark altnator 
8 0
3 years ago
Other questions:
  • What are the size and direction of the force that is the sum of a force of 3 n acting south and a force of 6 n acting north?
    12·1 answer
  • The ______________of matter depends upon how close the individual particles are together.
    13·1 answer
  • What type of interaction occurs when a wave hits an object that it cannot pass?
    12·1 answer
  • A plane flying against a jet stream will travel faster than a plane traveling with a jet stream. Please select the best answer f
    9·2 answers
  • Express 3 x 10-9s in milliseconds
    9·2 answers
  • You are part of a design team assigned the task of making an electronic oscillator that will be the timing mechanism of a micro-
    9·1 answer
  • A 5.0\, \text {kg}5.0kg5, point, 0, start text, k, g, end text box is at rest on a table. The static friction coefficient \mu_sμ
    11·2 answers
  • If the car traveled 754 meters in a straight line between 0 and 36 seconds, what was the
    5·1 answer
  • A 0.547 kg pizza is thrown straight up in the air. At a height of 2.30 m above the surface of the earth it has a speed of 5.00 m
    15·1 answer
  • The force required to maintain an object at a constant velocity in free space is equal to what ?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!