Question

Complete this sentence. If mass remains the same while the volume of a substance ________, the density of the substance will_______________.

decreases, increase
increases, increase
increases, stay the same
decreases, stay the same

Answer 1

Answer:

decrease, increase

Explanation:

density = mass/ volume

Answer 2

Answer: decreases, increase

Explanation: We define density (ρ) as the ratio of the mass of an object to the volume it occupies. The equation is given by:

ρ = M/V

here the symbol M stands for the mass of the object, and V the volume. Density has the units of mass divided by volume such as grams per centimeters cube (g/cm3) or kilograms per liter (kg/l).

Sample Problem

A block of wood has a mass of 8 g and occupies a volume of 10 cm3. What is its density?

Solution

The density will be 8g/10cm3 = 0.8g / cm3.
This means that every centimeter cube of this wood will have a mass of 0.8 grams.