Question
A student carries out an experiment to find the density of a rock.
Which two quantities does the student need to make to determine the density of the rock?
Answer/Explanation
Ans:A
Question
The density of air is $1.2 \mathrm{~kg} / \mathrm{m}^3$.
A room has dimensions $5.0 \mathrm{~m} \times 4.0 \mathrm{~m} \times 3.0 \mathrm{~m}$.
What is the mass of the air in the room?
A $0.02 \mathrm{~kg}$
B $0.10 \mathrm{~kg}$
C $50 \mathrm{~kg}$
D $72 \mathrm{~kg}$
Answer/Explanation
Ans:D
Question
A liquid has a volume of $0.040 \mathrm{~m}^3$ and a mass of $30000 \mathrm{~g}$.
What is the density of the liquid?
A $0.075 \mathrm{~kg} / \mathrm{m}^3$
B $7.5 \mathrm{~kg} / \mathrm{m}^3$
C $750 \mathrm{~kg} / \mathrm{m}^3$
D $7500 \mathrm{~kg} / \mathrm{m}^3$
Answer/Explanation
Ans:C
Question
The diagrams show four solid blocks with their dimensions and masses.
Which block has the greatest density?
Answer/Explanation
Ans: C
Question
A measuring cylinder contains 40 cm3 of water.
A solid metal ball is dropped into the water and the water level rises to 56 cm3. The mass of the ball is 80 g.
What is the density of the metal from which the ball is made?
A 0.20 g /cm3 B 1.4 g /cm3 C 2.0 g /cm3 D 5.0 g /cm3
Answer/Explanation
Ans: D