Question
A student carries out an experiment to find the density of a rock.
Which two measurements 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 $\quad 0.02 \mathrm{~kg}$
B $0.10 \mathrm{~kg}$
C $50 \mathrm{~kg}$
D $72 \mathrm{~kg}$
Answer/Explanation
Ans:D
Question
A small bottle has a mass of 20 g when empty. The volume of the bottle is 10 cm3
When full of liquid, the total mass is 150 g. What is the density of the liquid?
A 0.50 g /cm3
B 2.0 g /cm3
C 13 g /cm3
D 15 g /cm3
Answer/Explanation
Ans: C
A measuring cylinder contains 40 cm3 of water.
A stone of mass 94 g is lowered into the water so that it is fully submerged as shown.
What is the density of the stone?
A 1.1 g / cm3
B 1.2 g /cm3
C 2.1 g /cm3
D 2.6 g /cm3
Answer/Explanation
Ans: D
Question
A measuring cylinder contains 30 cm3 of a liquid.
Some more of the liquid is added until the liquid level reaches the 50 cm3 mark.
The reading on the balance increases by 30 g.
What is the density of the liquid?
A 0.60 g / cm3 B 0.67 g / cm3 C 1.5 g / cm3 D 1.7 g / cm3
Answer/Explanation
Ans: C