Question

A girl is floating in a freshwater lake with her head just above the water. If she weighs 610 N, what is the volume in cubic meters of the submerged part of her body?

Answer 1

how much water weighs 610 newtons?

Answer 2

I do not understand your question?

Answer 3

water has a defined weight, if we know how much it weighs per unit of volume, then we can calculate the volume by the weight of the person

Answer 4

how much water does it take to weigh 610 newtons?

Answer 5

what is the density of water?

Answer 6

i weigh about 250 lbs

when im floating in water, the amount of water that has been dispalced ... weighs 250 lbs.

Answer 7

it does not say. according to archimedes principle, any object completely or partially submerged in a fluid experiences an upward buoyant force equal to the magnitude of the weight of the displaced fluid. That is all I have

Answer 8

your course material has already defined the density of water ... its going to have to be a "known" value. If you havent memorized it yet, you might want to look it up.

Answer 9

Okay, can you give me a minute please? Im sure it is somewhere in the textbook

Answer 10

google might be quicker but yeah ill weight

Answer 11

999.97 kg/m³

Answer 12

999.97 kg/m^3

Answer 13

and refresh my memory, what is the Newton?

Answer 14

unit describing force.

Answer 15

i mean its equal to some kgm/s^2 or something like that ..

Answer 16

ok

V * 999.97 kg/m^2 = 610 kgm/s^2

solve for V

Answer 17

is gravity a component?

Answer 18

it is when we weigh things, which is why Newtons has s^2 under it ... acceleration unit i believe

Answer 19

so v x 999.97 x 9.81 = 610?

Answer 20

hmm, that might be prudent

Answer 21

isnt physics fun..

Answer 22

lol, it can be at times

Answer 23

i was wondering what to do with the s^2 in N :) gravity eats it for us

Answer 24

I mean if it is v x 999.97 x 9.81 = 610 then v = .0621

Answer 25

m^3 yes

Answer 26

assuming we aint got to do cm^3 that should do it

Answer 27

thank you

Answer 28

yep