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
dybincka [34]
3 years ago
9

Which equation best expresses the first law of thermodynamics, assuming Q is heat, U is internal energy, and W is work?

Physics
2 answers:
devlian [24]3 years ago
5 0

The first law of thermodynamics is expresses by

D. ΔU=Q-W

which means change in internal energy of system = Heat added to system minus work done by the system

All are expressed in Joules.

This law is based on principle of conservation of energy.

Likurg_2 [28]3 years ago
5 0

Answer:

(d) is the correct option ''\Delta U=Q-W''

Explanation:

The first law of thermodynamics states the law of conservation of energy i. e. heat energy can neither be created nor be destroyed. The mathematical expression that show the first law of thermodynamics is as follows:

\Delta U=Q-W

Where

\Delta U is the change in internal energy

Q is the amount if heat added to the system

W is the work done by the system

Hence, the correct option is (d)

You might be interested in
It is known that a shark can travel at a speed of 15 m/s.how far can a shark go in 10 seconds?
MrRissso [65]
If a shark can travel 15 miles per second, then it can go 150 miles in 10 seconds.
8 0
3 years ago
Read 2 more answers
Consider a system to be two train cars traveling toward each other. What is the total momentum of the system before the train ca
Brut [27]

Let say the two train cars are of masses m_1 and m_2

now if the speed of two cars are v_1 and v_2

then we can say that the momentum of two cars before they collide is given by

P = m_1v_1 - m_2v_2

here two cars are moving in opposite direction so we can say that the net momentum is subtraction of two cars momentum.

Now since in these two car motion there is no external force on them while they collide

So the momentum of two cars are always conserved.

hence we can say that the final momentum of two cars will be same after collision as it is before collision

P = m_1v_1 - m_2v_2

5 0
3 years ago
Read 2 more answers
Calculate the velocity of a wave that has a frequency of 60 Hz and wavelength of 2.0 m/s
mote1985 [20]

Answer:We have , a relation in frequency f and wavelength  λ of a wave having the velocity v as ,

           v=fλ ,

given f=60Hz , λ=20m ,

therefore velocity of wave , v=60×20=1200m/s

3 0
3 years ago
While hovering motionless 3.0 meters an asteroid, a small
AnnZ [28]
I have no idea what you are trying to ask sorry
4 0
3 years ago
n oscillator is driven by a sinusoidal force. The frequency of the applied force A : must be less than the natural frequency of
lilavasa [31]

Answer:

  B : is independent of the natural frequency of the oscillator

Explanation:

You can apply any force you like to a natural oscillator. It is independent of the natural frequency of the oscillator.

The result you get will depend on how the frequency of the applied force and the natural frequency relate to each other. It will also depend on the robustness of the oscillator with respect to the applied force.

Clearly, if the force is small enough, it will have no effect on the oscillator. If it is large enough, it will overpower any motion the oscillator may attempt. For forces in the intermediate range, there will be some mix of natural oscillation and forced behavior. One may modulate the other, for example.

5 0
3 years ago
Other questions:
  • A race car makes one lap around a track of radius 50m in 90sec. what is the average velocity?
    12·1 answer
  • if a truck falls for 33 seconds after it drives off a bridge into canyon below. how far does it fall before it hits the canyon f
    6·1 answer
  • A 1200 kg car is moving at 5.0 m/s east. it strikes an 1800 kg car at rest. the cars have an elastic collision and move in the e
    10·1 answer
  • What's is the biggest dog
    11·2 answers
  • Trucks 1 and 2 are traveling at the same constant velocity but truck 1's energy due to motion is two times less than that of tru
    9·1 answer
  • The engine on a fighter airplane can exert a force of 105,840 N (24,000 pounds). The take-off mass of the plane is 16,875 kg. (I
    8·1 answer
  • The small spheres that are moving through the circuit are the electric current. Current is the flow or movement of electrons. De
    10·2 answers
  • Describe how reactivity changes as you go down Group 1A.
    12·1 answer
  • 2 points
    5·2 answers
  • 7. A child pulls a sled up a snow-covered hill. The child does 360 J of
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!