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A drop of oil of volume 10 to the power of -10m cubed (0.0000000001) spreads out on water to make a circular film of of radius 0.1m. What is the thickness and radius of a film formed from four such drops? Supposing that the thickness of an oil slick on the sea is a thousand times that of this kind of film, and that the density of oil is 900 kgm to the power of -3 (0.001) find the volume and mass of a slick which forms a rectangular area 20km x 5m.

So... who can solve that?
 
anyone any good with german? i have to write 50 words in the imperfect tense about what i used to do!!! :S

got any ideas of what i can write??
 
Imperfect tense? That like ich gab, ich spielte, etc. right?
 
A drop of oil of volume 10 to the power of -10m cubed (0.0000000001) spreads out on water to make a circular film of of radius 0.1m. What is the thickness and radius of a film formed from four such drops? Supposing that the thickness of an oil slick on the sea is a thousand times that of this kind of film, and that the density of oil is 900 kgm to the power of -3 (0.001) find the volume and mass of a slick which forms a rectangular area 20km x 5m.

So... who can solve that?

:S i dont even understand it...let alone answer it, and i thought i was ok at physics!! lol
 
I'm good at KS3 physics.
xD
I'm good at KS4 maths.
But you've lost me at A level.
xD
 
Maybe if I split it up...

A drop of oil of volume 10 to the power of -10m cubed (0.0000000001) spreads out on water to make a circular film of of radius 0.1m. What is the thickness of the film?

What is the thickness and radius of a film formed from four such drops?

Supposing that the thickness of an oil slick on the sea is a thousand times that of this kind of film, and that the density of oil is 900 kgm to the power of -3 (0.001) find the volume and mass of a slick which forms a rectangular area 20km x 5m.

So...

.........................density
thickness = ----------------------- x length
.....................mass x width

Density is 9kgm. width is 0.2, and length is 0.2. I just don't know the mass...
 
stereophonics.jpg
 
Maybe if I split it up...

A drop of oil of volume 10 to the power of -10m cubed (0.0000000001) spreads out on water to make a circular film of of radius 0.1m. What is the thickness of the film?

What is the thickness and radius of a film formed from four such drops?

Supposing that the thickness of an oil slick on the sea is a thousand times that of this kind of film, and that the density of oil is 900 kgm to the power of -3 (0.001) find the volume and mass of a slick which forms a rectangular area 20km x 5m.

So...

.........................density
thickness = ----------------------- x length
.....................mass x width

Density is 9kgm. width is 0.2, and length is 0.2. I just don't know the mass...
ouch, that certainly is head hurting

poor georgie
 
Maybe if I split it up...

A drop of oil of volume 10 to the power of -10m cubed (0.0000000001) spreads out on water to make a circular film of of radius 0.1m. What is the thickness of the film?

What is the thickness and radius of a film formed from four such drops?

Supposing that the thickness of an oil slick on the sea is a thousand times that of this kind of film, and that the density of oil is 900 kgm to the power of -3 (0.001) find the volume and mass of a slick which forms a rectangular area 20km x 5m.

So...

.........................density
thickness = ----------------------- x length
.....................mass x width

Density is 9kgm. width is 0.2, and length is 0.2. I just don't know the mass...


Mass= density/volume.
 
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