Question

Consider the following geometric solids.
A sphere with a ratio of surface area to volume equal to 0.08 m-1.
A right circular cylinder with a ratio of surface area to volume equal to 2.1 m-1.
What results would you expect if these two models were compared in a diffusion test?

Answer 1

A. The rate of diffusion would be the same for the two models.
B. The rate of diffusion would be faster for the right cylinder.
C. The rate of diffusion would be slower for the right cylinder.
D. The rate of diffusion would be faster for the sphere.

Answer 2

@jenny1994

Answer 3

suppose they have the same Volume ... which has bigger surface Area?
(what does diffusion go _thru_?)

Answer 4

d

Answer 5

@lightgrav

Answer 6

@lightgrav

Answer 7

d ?? the stuff needs to diffuse thru the surface, and the cylinder is shaped like a pencil!
(the cylinder's surface Area is 24x as large as the sphere's Area).
These ratios are Area/Volume, since they have units 1/m .

Answer 8

so it will be the same

Answer 9

how long will it take the stuff to get from the center of the spherical lump to the surface?
it has to go 24x as far ... and the diffusion distance goes like sqrt(t) ... or diffusion time goes like d^2

Answer 10

so its 24^2

Answer 11

don't wad up your wet socks - they won't dry!

Answer 12

bruh so its either b or c

Answer 13

HELP

Answer 14

the stretched sock dries fast. the stretched sock is shaped like the cylinder. drying takes place by diffusion, so the stuff only gets out if it's near the surface..

Answer 15

so b

Answer 16

so b or d

Answer 17

come on! what don't you get, here?
c and d mean the same thing (so you _know_ neither of them can be right!)

Answer 18

b