Physics modeling for sky lantern

AI Thread Summary
The discussion focuses on the physics modeling of sky lantern motion, questioning whether the temperature inside the lantern can be assumed uniform, leading to consistent air density. Participants explore the possibility of treating the lantern as a heat engine to analyze its behavior. The implications of temperature variations on buoyancy and lift are also considered. The conversation emphasizes the need for accurate assumptions in modeling to predict the lantern's motion effectively. Overall, the discussion highlights the complexities involved in accurately modeling the physics of sky lanterns.
radhos
Messages
1
Reaction score
0

Homework Statement



What is the best physics modeling for the motion of sky lantern? can I assume that the temperature in the lantern same in every place so that the air density is same too?

Homework Equations


The Attempt at a Solution

Homework Statement


Homework Equations


The Attempt at a Solution

 
Physics news on Phys.org
Can't one treat it as a heat engine?
 
Last edited:

Thread 'Errors and significant figures'

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...
View full post »
Thread 'Collision of a bullet on a rod-string system: query'

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...
View full post »
Thread 'A cylinder connected to a hanging mass'

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...
View full post »

Similar threads

Modeling a kongming lantern (sky lantern)
Replies
6
Views
2K
Pressure Difference: F=10 Tonnes, A=100 sq m - Calculate & Understand
Replies
5
Views
1K
What percent of the sky can an astronomer see at one time?
Replies
5
Views
2K
Inclination angle between the orbital plane and the plane of the sky
Replies
1
Views
2K
Ground wave vs. sky wave stability
Replies
7
Views
3K
Doppler Effect Source Moving Closer
Replies
5
Views
2K
Projectile Motion - is this solvable?
Replies
29
Views
3K
How Can You Launch a Toothpick 12 Inches Using a Battery, Magnets, and Wire?
Replies
2
Views
3K
Freefall v Jetpack: Will He/She Stay Afloat or Crash?
Replies
7
Views
2K
Why does Venus always appear close to the Sun in the sky?
Replies
23
Views
4K

Hot Threads

Recent Insights

Back
Top