An object has a density of 1.4 g/cm . It is slowly lowered into a graduated cylinder whose water level was 65 mL. When the object is completely submerged the water level rises to 90 mL. What is the mass of the object?

Explanation:

Weight

A measure of the force of gravity on an object

Mass

The measurement of how much matter an object contains

Volume

The amount of space that matter occupies

Density

The physical property that relates the mass and volume of an object or material

Unlike weight, mass doesn't change with location, even when the force of gravity on an object changes

Why do scientists prefer to describe its matter by its mass rather than its weight?

International System of Units

What system of units do scientists use to measure the properties of matter?

Liter, milliliter, cubic centimeter

3 common units of volume

Volume= length•width•height

Volume formula

Sand and feathers have different densities

Why does a kg of sand take up much less space than a kg of feathers?

Density=mass/volume

Density formula

Objects with densities greater than water will sink and objects with densities less than water will float. The density of wood is less than water (1 g/cm3) and the density of iron is greater than water (1 g/cm3)

If you drop a block of iron and block of wood into water, the iron sinks and the wood floats. What can you conclude about the density of iron and wood compared to the density of water?

V=2,400 cm3

A box has a length of 25 cm, a width of 8 cm, and a height of 12 cm. What is its volume?

D= 13.5 g/cm3

A sample of metal has a mass of 94.5 g and a volume of 7 cm3. What is its density?

Mass= density•volume

Mass formula

M= 234.26 g

Corn oil has a density of 6.89 g/cm3. What is the mass of 34.0 cm3 of corn oil?

Yes. No. The pull of gravity is different on the moon.

A solid has a mass of 180. Would the solid have a mass of 180 g on the moon? Would it have the same weight on Earth as on the moon? Explain.

No, because only the mass and volume will change

Will every solid with the same dimensions have the same density?

Grams and kilograms

Common units for mass

Grams per cubic centimeter or grams per cubic milliliter

Common units for density

V= 20 ml

D= 0.75 g/cm3

George put 25 ml of water into a graduated cylinder. After adding a solid object, the water level in the cylinder rose to 45 ml. What is the volume of the object? The object George is examining has a mass of 15 grams. What is the density of the object?