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
VikaD [51]
3 years ago
14

What is the change in internal energy if 60 J of heat is released from a system and 30 J of work is done on the system? Use U =

Q - W.
\
Physics
1 answer:
k0ka [10]3 years ago
8 0

The change in internal energy of the system is +30 J

Explanation:

We can solve this problem by using the first law of thermodynamics, which states that the change in internal energy of a system is given by the equation:

\Delta U = Q -W

where

\Delta U is the change in internal energy

Q is the heat absorbed by the system (positive if it is absorbed, negative if it is released)

W is the work done by the system (positive if it is done by the system, negative if it is done by the surroundings on the system)

Therefore, in this problem, we have

Q=-60 J (heat released by the system)

W=-30 J (work done on the system)

Therefore, the change in internal energy is

\Delta U = -60 - (-30) = +30 J

Learn more about thermodynamics:

brainly.com/question/4759369

brainly.com/question/3063912

brainly.com/question/3564634

#LearnwithBrainly

You might be interested in
A man pushed a cabinet with a force of 200N. What is the mass of the cabinet that accelerates 4 m/s/s?​
ELEN [110]

Answer:

\boxed {\boxed {\sf 50 \ kg}}

Explanation:

We are asked to find the mass of a cabinet, given the force and acceleration. According to Newton's Second Law of Motion, force is the product of mass and acceleration. The formula for this is:

F= m \times a

The force is 200 Newtons, but we should convert the units to make unit cancellation easier. 1 Newton is equal to 1 kilogram meter per second squared, so the force of 200 Newtons is 200 kilogram meters per second squared.

The mass is unknown and the acceleration is 4 meters per second per second or 4 meters per second squared.

  • F= 200 kg*m/s²
  • a= 4 m/s²

Substitute the values into the formula.

200 \ kg *m/s^2 = m \times 4 \ m/s^2

We are solving for the mass, m, so we must isolate the variable. It is being multiplied by 4 meters per second squared. The inverse operation of multiplication is division. Divide both sides by 4 m/s²

\frac {200 \ kg *m/s^2}{4 \ m/s^2}= \frac{m \times 4\ m/s^2}{4 \ m/s^2}

\frac {200 \ kg *m/s^2}{4 \ m/s^2} =m

The units of meters per second squared cancel.

\frac {200 \ kg }{4 }=m

50 \ kg =m

The mass of the cabinet is <u>50 kilograms.</u>

5 0
2 years ago
How does the frequency of infrared electromagnetic waves compare with the frequency of radio and microwaves?
iVinArrow [24]

Answer:

Answer is B.

Because the wavelength of infrared is shorter than microwave radiation

8 0
3 years ago
The primary source of most of the moisture for the earths atmosphere is
SpyIntel [72]
I think is ocean but I'm not sure
6 0
2 years ago
A sound that's produced by a single wave at a constant frequency and with no overtones is called
notka56 [123]
It is called a pure sound
7 0
3 years ago
A 53.0-kg skater is traveling due east at a speed of 2.90 m/s. A 72.0-kg skater is moving due south at a speed of 6.20 m/s. They
soldier1979 [14.2K]

Answer:

a.\thta=71^{\circ}

b.v_f=3.78 m/s

Explanation:

We are given that

m_1=53 kg

v_1=2.9 m/s

m_2= 72 kg

v_2=6.2 m/s

a.We have to find the angle

\theta=tan^{-1}{\frac{m_2v_2}{m_1v_1}=\frac{72(6.2)}{53(2.9)}=71^{\circ}

\theta=71^{\circ}

b. We have to find the speed v_f

According to law of conservation of momentum

m_1v_1=(m_1+m_2)v_fcos\theta

53(2.9)=(53+72)v_fcos 71^{\circ}=40.7 v_f

v_f=\frac{153.7}{40.7}=3.78 m/s

3 0
3 years ago
Other questions:
  • If you double the net force on an object what was the result on the acceleration be
    12·1 answer
  • A golf ball is given an initial speed of 20. meters
    11·2 answers
  • Technician A says that a good relay should measure between 60 and 100 ohms across the coil terminals. Technician B says that OL
    14·1 answer
  • What is the momentum of 70 kg runner traveling at 10 m/s?
    14·2 answers
  • 1) What happens to the energy carried in the transverse wave as the<br> amplitude increases? *
    7·1 answer
  • Create a multimedia presentation about your favorite element.
    12·2 answers
  • Which statement best describes the difference between acceleration and velocity?
    10·1 answer
  • Zach, whose mass is 85 kg, is in an elevator descending at 8 m/s. The elevator takes 3.2 s to brake to a stop at the first floor
    9·1 answer
  • How many electrons should be in an atom’s valence shell (with the exception of hydrogen and helium) to become stable? 2 4 6 8.
    15·1 answer
  • If I am lifting a box with a force of 100 N and the box has an acceleration of 10 N, what is the mass of the box?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!