# Homework Help: A throphy has a mass of 3.85kg and a volume of 480cm3 -- Help please

1. Apr 1, 2015

### Luke White

Find the density

2. Apr 1, 2015

### Luke White

Find the density of the throphy

3. Apr 1, 2015

### rock.freak667

What is the definition of density?

4. Apr 1, 2015

### Luke White

mass per unit volume as i know .

5. Apr 1, 2015

### rock.freak667

Right, so if you are given a mass of 3.85 kg and a volume of 480 cm3, what would be the mass per unit volume?

6. Apr 1, 2015

### Luke White

how can you work it out?

7. Apr 1, 2015

### rock.freak667

Were you taught the concept of density and the formula associated with it?

If meter per second means 1 m divided by 1 s, what what mass per unit volume give?

8. Apr 1, 2015

### Luke White

its p=m/v how can I find the density?

9. Apr 1, 2015

### rock.freak667

what do m and v represent in your equation?

10. Apr 1, 2015

### Luke White

mass and volume...

11. Apr 1, 2015

### rock.freak667

Good. And you are told mass = 3.85 kg and volume = 480 cm3, so if you put those values into your formula, what do you get?

12. Apr 1, 2015

### Luke White

I have to divide them? Then it says that gold has a density of 19,000kg/m3 . Is the throphy made out of real gold

13. Apr 1, 2015

### rock.freak667

Yes you have to divide them. If you are given those values and your density doesn't match up to 19,000 kg/m3, then it isn't made out of real gold.

14. Apr 1, 2015

### Luke White

so 3.85 divide 480 = 8.02083333 <--- density... so not real gold

15. Apr 1, 2015

### rock.freak667

Yes, but don't forget your units. You divided kg by cm3, so your units are kg/cm3