# RAIN FALL QUESTIONS-CAN'T FIND PART 4 about kg!

1. Sep 9, 2010

### tmoney23

RAIN FALL QUESTIONS---CAN'T FIND PART 4 about kg!

1. The problem statement, all variables and given/known data

During a thunderstorm, a total of 0.9 inches of rain falls. How much water falls on one acre of land? (1 mi2 = 640 acres) Express your answer in the following ways.

I found ft^3, m^3, and in^3, but I'm stumped on part 4...where it asks for kg??

2. Relevant equations

I found 564376 in^3, 3267 ft^3, and 92.5111378 m^3 and I know these 3 parts are 100 percent correct?
JUST NEED HELP WITH PART 4 ON HOW TO FIND kg!

3. The attempt at a solution

2. Sep 9, 2010

### rock.freak667

Re: RAIN FALL QUESTIONS---CAN'T FIND PART 4 about kg!

A relevant equation you will need is density, ρ=m/V.

What is the density of water ?

3. Sep 9, 2010

### tmoney23

Re: RAIN FALL QUESTIONS---CAN'T FIND PART 4 about kg!

SORRY!!!

NOTE: Density of 1000kg/m^3!

Thanks. sorry again

4. Sep 9, 2010

### rock.freak667

Re: RAIN FALL QUESTIONS---CAN'T FIND PART 4 about kg!

Well then, if you have the formula ρ=m/V, you know 'ρ' and you know 'V', you want to find 'm', rearrange the formula and make 'm' the subject.

5. Sep 9, 2010

### tmoney23

Re: RAIN FALL QUESTIONS---CAN'T FIND PART 4 about kg!

i still dont get it??? i know my mass is x, what is the density in this problem??? Would i take the 1000kg/92.5111378 m^3????? and then my volume is 92.5111378 m^3....so I would get m=dv....so d=10.8095 and then v is 92.5111378 m^3, d times v equals 1000?

6. Sep 9, 2010

### rock.freak667

Re: RAIN FALL QUESTIONS---CAN'T FIND PART 4 about kg!

m=ρV.

You told me density ρ=1000kg/m3

And the volume V=92.5111378m3?

Just substitute into the formula.

7. Sep 10, 2010

### tmoney23

Re: RAIN FALL QUESTIONS---CAN'T FIND PART 4 about kg!

SO the answer is 1000kg after doing the math out?