Which of these means changing state from solid directly to gas?
A
B
C
D
(b) An object has a mass of 7.22 x 10² kg and a volume of 2.69 x 10⁵ m³ - Edexcel - GCSE Physics - Question 3 - 2023 - Paper 2
Question 3
Which of these means changing state from solid directly to gas?
A
B
C
D
(b) An object has a mass of 7.22 x 10² kg and a volume of 2.69 x 10⁵ m³.
Calculate the dens... show full transcript
Worked Solution & Example Answer:Which of these means changing state from solid directly to gas?
A
B
C
D
(b) An object has a mass of 7.22 x 10² kg and a volume of 2.69 x 10⁵ m³ - Edexcel - GCSE Physics - Question 3 - 2023 - Paper 2
Step 1
Changing state from solid directly to gas
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The process of changing state from solid directly to gas is called sublimating.
Step 2
Calculate the density, 𝜌, of the object
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
To find the density, use the formula:
ρ=Vm
where:
Mass, m = 7.22 x 10² kg
Volume, V = 2.69 x 10^5 m³.
Substituting these values gives:
ρ=2.69×1057.22×102≈0.00268 kg/m3
Thus, the density is approximately 2,680 kg/m³.
Step 3
State the unit
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The unit for density is kg/m³.
Step 4
Suggest two sentences to complete the student's procedure
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
I ensured that the piece of metal was fully submerged in the water.
I recorded the difference in water level before and after adding the metal to find the volume of the metal.
