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
How many questions are on cumulative tests? on edgenutiy
Evgesh-ka [11]
Roughly 50 for me i dont know about anyone else
8 0
3 years ago
3<br> What is happening in this graph from point B to C?
neonofarm [45]
You have a photo? I could help you if you show me a picture!
8 0
3 years ago
At which of the following angles will the sunlight received at a location on Earth spread out over the largest area?
yarga [219]
10 degrees, because 0 degrees will receive the most sunlight, and 10 degrees is closest to 0 degrees.
5 0
3 years ago
Read 2 more answers
You are parking your vehicle downhill next to a curb. how should you position the wheels
REY [17]
When you<span> stop </span>your car<span> headed </span>downhill, turnyour<span> front </span>wheels<span> toward the </span>curb<span>.</span>
8 0
3 years ago
What type of plants are low growing, have thin cell walls, and do not have roots.
igor_vitrenko [27]

Answer:

the answer is moss

Explanation:

moss is a low growing plant without roots and thin cell walls

3 0
3 years ago
Read 2 more answers
Other questions:
  • Who reported four “element” classifications, but included some substances that were combinations of elements rather than true el
    11·1 answer
  • A piece of metal will feel colder than a piece of wood at the same temperature. Why?
    6·1 answer
  • The lower atmosphere is mostly warmed by radiated heat from Earth's surface. However, water heats up and cools down more slowly
    15·2 answers
  • A photon is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized.
    5·1 answer
  • 8. What is the weight in newtons of a 10 kg mass on the earth's surface?
    11·1 answer
  • Which terms describe the purpose of antennas on devices that use radio waves
    11·1 answer
  • A 500 gram mass attached to a horizontal spring
    6·1 answer
  • Why do reflecting telescopes usually have a secondary mirror in addition to a primary mirror?
    6·1 answer
  • A drawback of burning biomass to produce electricity is that it is ___.
    13·1 answer
  • A 30 cm scale has one end broken. The mark at the broken end is 2.6 cm. How would you use it to measure the length of your penci
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!