Question

I have trouble figuring out these questions help!!

1. A metal ball has a mass of 2kg and a volume of 6m to the third power.What is its density?

2. A certain gas expands to fill a 3L container.Its madd is measures to be 0.6 kg what is the density?

3. A solid is 5cm tall, 3 cm wide and 2 cm thick it has a mass of 129g. What is its density?


4. In terms of volume,how do ml and cm to the third power relate to one another?

5. A graduated cylinder is filled to an initial volume of 12.7 mL.A rock is dropped into the graduated cylinder.The final volume of the graduated cylinder is 18.2 mL what is the rocks volume?
what method was used to determine this?

Answer 1

1. Density=mass/volume=2kg/6m=0.33kg/m (convert to proper units)
2. Density=mass/volume=0.6kg/3L=0.2kg/L (convert to proper units)
3. Density=mass/volume= 129g / 30 cm (convert to proper units)
V=length*width*height=2*3*5 = 30
4. Volume (units) = cm^3 because, like in problem 3, Volume=width(cm)*length(cm)*height(cm)
However, when you pour liquid into a cylinder (so the volume would be the liquid), you measure it in mL.
5. Volume with rock - initial volume (without the rock) = Volume of rock
18.2-12.7= 5.5