# psb3 014 ☈ Name:

1. The graph shows data gathered by a student in SC 130 physical science for the density of soap.

__________ What is the slope of the line without any units?
2. ______________ What is the density ρ of the soap (include units!)?
3. ______________ Will the soap float or sink?
4. __________ A student measures a bar of soap with a length of 5 cm, a width of 3 cm, and a height of 2 cm. What is the volume of the soap?
5. __________ A student measures a bar of soap with a length of 5 cm, a width of 3 cm, and a height of 2 cm. The soap has a mass of 36 grams. What is the density of the soap?
6. ____________________ A student measures the length of a piece of soap using a ruler. Is the measurement a primary or calculated measurement?
7. Why do you think the bar of soap knew what to do in the laboratory on Thursday when placed into the water?
8. _____________ A bar of soap is found to have a density of 1.6 g/cm³. If the volume of the soap is 100 cm³, what is the mass of the soap?
9. Plot the data provided on the graph below and draw a line through the points.
10. ________________ Calculate the slope of the line.
11. ________________ Write the units of the slope.

12. As seen in the image, three identical vials have equal amounts of a green liquid. Why are two floating and one has sunk to the bottom? Explain below.

$\text{slope m}=\frac{\left(\mathrm{y2}-\mathrm{y1}\right)}{\left(\mathrm{x2}-\mathrm{x1}\right)}$
mass m = (density ρ)×(Volume V)
V = lwh