Hi ..

How are you all ...

I have a question .. I tried solved

http://store2.up-00.com/Feb12/0Mf90391.jpg [Broken]

Last edited by a moderator:

Volume is cubic meters, not square meters which is area.

Specific gravity is the ratio of density of a material to that of water which is 1000kg/cubic meter.

Mass:

M=specific gravity * density of water * volume

mass of tank

M=specific gravity * density of water * volume of oil
= (0.8) (1000) (4)
= 3200kg/m^3

mass of waater : M=density of waterX volume X g[/COLOR]

Here is the volume of water will be 2
1000 X 2 X 9.81
= 19620kg/m^3

Total is (3200kg) + (19620kg) = 22820kg/m^3

Is ok now ?

Last edited:
mass of tank

M=specific gravity * density of water * volume of oil
= (0.8) (1000) (4)
= 3200kg/m^3

mass of waater : M=density of waterX volume X g[/COLOR]

Here is the volume of water will be 2
1000 X 2 X 9.81
= 19620kg/m^3

Total is (3200kg) + (19620kg) = 22820kg/m^3

Is ok now ?

Units work just like ordinary algebra. In your first computation for mass of oil you multiply density in kg/m^3 by m^3 yet get kg/m^3. Question requests mass. You have correct number but wrong units.

In your second computation, why do you multiply by g? Your units will be:

(kg/m^3)*m^3*(m/sec^2) which is kg-m/sec^2 which is Newtons.

Pay attention to units. If your units don't jive with what should be your answer, you obviously have an error.

3200 kg , 2000 kg, thus the total is 5200 kg.

In your diagram which liquid is oil and which is water? The accuracy of the relative amounts of oil and water could be improved. As your diagram now stands, I do not think the teacher is going to give you much credit for it.

http://www.roo7oman.com/up/files/384678.jpg

see here

Your diagram looks good but if your oil is that dirty, you should change it!

hhhhh how is dirty ?

I was joking. If the oil in the crankcase of your automobile looks that black, you should change it.

hhhhhhhh ...I don't have money to change it . ^)^