What Factors Affect the Rate of Heat Loss?

AI Thread Summary
The discussion focuses on the factors influencing the rate of heat loss, specifically addressing the cooling of substances over time. It highlights the importance of the temperature gradient, noting that a steeper gradient results in a faster rate of temperature decrease. Additionally, the nature of the substance significantly impacts the rate of cooling, with different materials exhibiting varying thermal properties. The conversation acknowledges previous discussions on these topics, indicating a continuity in exploring the principles of heat transfer. Understanding these factors is crucial for applications in thermodynamics and material science.
franz32
Messages
133
Reaction score
0
Hi everyone!

I have some questions...

1. Describe the fall in the temperature of a cooling substance as a function of time.

2. Describe the effect of temperature gradient upon the rate of temp. fall.

3. Describe the effect of the nature of the substance upon the rate of fall in the temp.
 
Physics news on Phys.org
How is this "more"? These look like exactly the same questions you posted before.
 
Sorry, Hallsof Ivy

... yeah, I should have written it continuation.

Yes, it is the same as there... But don't worry, I have recalled from your answers before... and so I got the answers too.
 
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