Do Objects of the Same Material Always Share Identical Internal Energies?

  • Thread starter Thread starter cathole
  • Start date Start date
  • Tags Tags
    Energies Internal
AI Thread Summary
For two objects of the same material to have identical internal energies, they must have the same temperature, as internal energy is directly related to temperature. Equal mass and density are not necessary conditions for identical internal energies. The discussion emphasizes that separate objects can indeed have the same internal energy if their temperatures are equal. Additionally, the concept of internal energy is clarified as being dependent on temperature rather than mass or density alone. Understanding these factors is crucial for analyzing internal energy in thermodynamics.
cathole
Messages
9
Reaction score
0
Question about internal energies... PLEASE HELP ME!

What must be true for two objects of the same material to have the same internal energies?
(Choose all that apply)

a. The masses of both objects must be equal

b. Both objects must have the same density

c. The temperatures of both objects must be equal

d. Separate objects cannot have identical internal energies
 
Physics news on Phys.org


What does internal energy depend on?
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top