Mechanical properties of solids questions

AI Thread Summary
Intermolecular forces are characterized as short-range, as their effects diminish significantly at larger distances, despite some attraction persisting even at infinity. The discussion highlights that the nature of these forces is distance-dependent, invalidating the notions of purely attractive or repulsive forces. Additionally, it addresses the relationship between kinetic and potential energy in solids, asserting that the kinetic energy of molecules is lower than their potential energy. This principle applies to solids due to the close packing of molecules and their limited movement. Overall, the conversation focuses on clarifying the nature and implications of intermolecular forces and energy states in solids.
Mandavi
Messages
20
Reaction score
0

Homework Statement


Intermolecular forces are
1- Attractive only
2-Repulsive only
3-Long-range
4-Short-range


Homework Equations


The 1st and 2nd options are not valid as the nature depends on the distance between the molecules.


The Attempt at a Solution


The answer given is short-range.How is that?Even,at infinity,the force does not become zero as even then,attractive forces should act.Or is it so,because intermolecular distances are measured on a very small scale and therefore,they are not valid for long distances?
 
Physics news on Phys.org
This is another question from the same topic.
"In a solid,the kinetic energy of molecules is less than the magnitude of their potential energy."
How did we come to this conclusion?I know it is true for an atom,but why do we say this for molecules of a solid too?
 
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Struggling to make relation between elastic force and height'

Thread 'Struggling to make relation between elastic force and height'

Hello guys this is what I tried so far. I used the UTS to calculate the force it needs when the rope tears. My idea was to make a relationship/ function that would give me the force depending on height. Yeah i couldnt find a way to solve it. I also thought about how I could use hooks law (how it was given to me in my script) with the thought of instead of having two part of a rope id have one singular rope from the middle to the top where I could find the difference in height. But the...
View full post »

Similar threads

Mechanical Advantage in a crank system
Replies
26
Views
9K
Properties of electric charges - insulators and conductors
Replies
1
Views
4K
Mechanical Resonance Lab Questions
Replies
1
Views
2K
I Navier-Stokes equation in a triangular coordinate system
Replies
3
Views
2K
Two bodies connected with an elastic thread moving with friction
Replies
6
Views
1K
I To rejuvenate the plausibility of stochastic mechanics
Replies
1
Views
2K
A Non-equilibrium Statistical Mechanics of Liquids
Replies
3
Views
2K
Solid Mechanics - Uniqueness of Plane Stress State
Replies
2
Views
2K
Beads on a thread - What stops the acceleration?
Replies
40
Views
4K
B When to think of PE as property of a system vs of a particle
Replies
7
Views
1K

Hot Threads

Recent Insights

Back
Top