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
Furkat [3]
2 years ago
9

A system of releases 125kJ of heat while 104kJ of work is done in the system. Calcilate the change om imternal energy (in kJ)

Physics
1 answer:
artcher [175]2 years ago
4 0

Answer:

DU = 21 KJ

Explanation:

Given the following data;

Quantity of heat = 125 KJ

Work = 104 KJ

To find the change in internal energy;

Mathematically, the change in internal energy of a system is given by the formula;

DU = Q - W

Where;

DU is the change in internal energy.

Q is the quantity of energy.

W is the work done.

Substituting into the formula, we have;

DU = 125 - 104

DU = 21 KJ

You might be interested in
The diagram shows how air circulation forms a sea breeze on a warm day. A beach meets the sea in the middle of the image with a
nadezda [96]
Yes it was then a red left label
7 0
3 years ago
Read 2 more answers
Photosynthesis and respiration are best described as
Olin [163]
The answer is 3. Photosynthesis removes carbon dioxide while respiration puts back carbon dioxide
7 0
2 years ago
Read 2 more answers
What is a hypothesis
notsponge [240]
A hypothesis can be described as an intelligent guess 
7 0
3 years ago
A constant force of 20. newtons applied to a box causes it to move at a constant speed of 4.0 meters per second. How much work i
podryga [215]
The answer is 3) 480 joules
6 0
2 years ago
A bug flying horizontally at 0.65 m/s collides and sticks to the end of a uniform stick hanging vertically. After the impact, th
irina [24]

The angular momentum is defined as,

L=I\omega

Acording to this text we know for conservation of angular momentum that

L_i=L_f

Where L_iis initial momentum

L_f is the final momentum

How there is a difference between the stick mass and the bug mass, we define that

Mass of the bug= m

Mass of the stick=10m

At the point 0 we have that,

L_i=mvl

Where l is the lenght of the stick which is also the perpendicular distance of the bug's velocity

vector from the point of reference (O), and ve is the velocity

At the end with the collition we have

L_f=(I_b+I_s)\omega

Substituting

L_f=(ml^2+\frac{10ml^2}{3})\omega

L_f=\frac{13}{10}ml^2w

m(0.65)l=\frac{13}{10}ml^2 \omega

\omega=\frac{1}{2l}

Applying conservative energy equation we have

\frac{1}{2}(I_b+I_s)\omega^2=mgh+10mgh'

\frac{1}{2}(ml^2+\frac{10ml^2}{3})(\frac{1}{2l})^2=mg(l-lcos\theta)+\frac{10}{2}mg(l-lcos\theta)

Replacing the values and solving

l=\frac{13}{0.54g}

Substituting

l=\frac{13}{0.54(9.8)}

l=2.45cm

7 0
3 years ago
Other questions:
  • A tightly sealed glass jar is an example of which type of system?
    15·2 answers
  • An object traveling at a 5.0 m/s East has a mass of 4.0kg. What is the magnitude of the object’s momentum?
    6·1 answer
  • If a substance was described as smooth, square, and tan, what properties are
    7·2 answers
  • Please help!!
    12·1 answer
  • Can a small force exert a greater torque than a larger<br> force.Explain.
    14·1 answer
  • 8. A roller coaster's velocity at the top of a hill is 10 m/s. It reaches the bottom of the hill with a
    12·1 answer
  • A force of 36.0 N is required to start a 3.0-kg box moving across a horizontal concrete floor. Part A) What is the coefficient o
    15·1 answer
  • In which situation would alley cropping be most useful for sustainable farming?(1 point)
    12·1 answer
  • Calculate the average (mean) of these numbers: 6, 5, 7, 9.8*
    15·1 answer
  • !! Offering 50 points !!
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!