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
mojhsa [17]
3 years ago
7

In a certain process, the energy of the system decreases by 250 kJ. The process involves 480 kJ of work done on the system. Find

the amount of heat Q transferred in this process. Express your answer numerically in kilojoules. Make your answer positive if the heat is transferred into the system; make it negative if the heat is transferred into the surroundings.
Physics
2 answers:
gregori [183]3 years ago
6 0

Answer:

Q = - 730 KJ

730 KJ is transferred out of the system

Explanation:

According to the first law of thermodynamics, energy can neither be created nor destroyed, but can be transformed from one form to another.

For a particular process/system, the first law is interpreted as

ΔU = Q + W (depending on convention, some textbooks give this relation as ΔU = Q - W)

ΔU is the change in internal energy of the system, in my convention, it is positive if the internal energy increases and negative otherwise.

Q = Heat transferred into or out of the system. Q is positive for heat transferred into the system and negative for heat transferred out of the system.

W = workdone by the system or work done on the system. W is positive for workdone on the system and W is negative for when work is done by the system.

ΔU decreases by 250 KJ, that is, ΔU = - 250 KJ

Q = ?

W = 480 KJ (Work is done on the system)

- 250 = Q + 480

Q = - 250 - 480 = - 730 KJ

The heat is transferred out of the system.

ra1l [238]3 years ago
5 0

Answer:

The amount of heat Q transferred in this process is 230 kJ

Explanation:

Please look at the solution in the attached Word file.

Download docx
You might be interested in
How do you put 1/2000 into scientific notation? *
maksim [4K]
It’s e 2.0 x 10^-4 because it is a fraction
4 0
3 years ago
what occurs in a chemical reaction? A. Reactants are formed without chemical bonds being broken B. Reactants are formed from pro
Ann [662]
The answer is D. Products are formed from reactants by the breaking and forming of new bonds. 
3 0
3 years ago
Read 2 more answers
A hydrogen atom in a galaxy moving with a speed of 6.65×106 m/???? away from the Earth emits light with a wavelength of 5.13×10−
Mumz [18]

Answer:

The observed wavelength on Earth from that hydrogen atom is 5.24\times 10^{-7}\ m.

Explanation:

Given that,

The actual wavelength of the hydrogen atom, \lambda_a=5.13\times 10^{-7}\ m

A hydrogen atom in a galaxy moving with a speed of, v=6.65\times 10^6\ m/s

We need to find the observed wavelength on Earth from that hydrogen atom. The speed of galaxy is given by :

v=c\times \dfrac{\lambda_o-\lambda_a}{\lambda_a}

\lambda_o is the observed wavelength

\lambda_o=\dfrac{v\lambda_a}{c}+\lambda_a\\\\\lambda_o=\dfrac{6.65\times 10^6\times 5.13\times 10^{-7}}{3\times 10^8}+5.13\times 10^{-7}\\\\\lambda_o=5.24\times 10^{-7}\ m

So, the observed wavelength on Earth from that hydrogen atom is 5.24\times 10^{-7}\ m. Hence, this is the required solution.

8 0
2 years ago
Pluto has been reassigned and is now a dwarf planet. Why did scientists think this reassignment was necessary? If you were a sci
kap26 [50]

Answer:

Explanation:

we humans have our own ify classification for celestial objects, most people are saddened that pluto is not a planet anymore altho it hasn't changed at all.

scientist say that if an object is going to be considered a planet it must fill in these three checkboxes:

You must be spherical, you must orbit a star, and you must have already cleared your path or debris.

Pluto fills in the first two boxes but it does orbit in the keyperbelt and there are 5 other objects just like it. this is why pluto has been dubbed a dwarf planet.

6 0
2 years ago
Read 2 more answers
What are the complementary colors of magenta? Blue? And cyan?
zysi [14]

Answer:

Magneta is a mix of blue and red and is a secondary colour.

Explanation:

As we can see green is the complementary colour of Magneta.Complementary colours are the pairs of colours which when combined cancel each other out. This means that when combined they produce a grayscale colour like white or black .

4 0
3 years ago
Other questions:
  • A movie stunt performer is filming a scene where he swings across a river on a vine. The safety crew must use a vine with enough
    5·1 answer
  • Kinetic energy is the energy of ______. It increases with mass ______ and _______ .Potential energy is the energy of _______or__
    6·1 answer
  • Who were Socrates and Plato
    8·2 answers
  • A flat surface is in a uniform magnetic field. Given only the area of the surface and the magnetic flux through the surface, it
    10·1 answer
  • 386.5<br>- 129.18 what is it​
    8·2 answers
  • A red blood cell has a diameter of approximately 8 micrometers, or 0.008 um.
    8·2 answers
  • Charge q is a test charge used to measure the electric field created by a source charge Q. What happens to the magnitude of the
    8·1 answer
  • A free undamped spring/mass system oscillates with a period of 4 seconds. When 10 pounds are removed from the spring, the system
    5·1 answer
  • I need help and I don't understand if you can help me but let it be before 6:00
    5·1 answer
  • Predict the magnitude of the gravitational force....
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!