A rectangular brick has dimensions 5.0 cm × 8.0 cm × 20.0 cm. Its volume in cubic metres is
8.0 × 10^{-4}
8.0 × 10^{-2}
8.0
800
The brick in question 1 has a mass of 2.5 kg. Its density in kg m^{-3} is:
3.1
31
310
3100
An empty paint tin has a diameter of 0.150 m and a height of 0.120 m, and a mass of 0.22 kg. It is then filled with paint to a depth of 7mm from the top. Now the paint tin has a total mass of 6.50 kg. The mass of the paint is:
3.14 kg
6.28 kg
6.78 kg
7.56 kg
An empty paint tin has a diameter of 0.150 m and a height of 0.120 m, and a mass of 0.22 kg. It is then filled with paint to a depth of 7mm from the top. Now the paint tin has a total mass of 6.50 kg. What is the volume of the paint in m^{3}?
3.14 ×10^{-4}
8.24 × 10^{-4}
2.00 × 10^{-3}
8.00 × 10^{-3}
An empty paint tin has a diameter of 0.150 m and a height of 0.120 m, and a mass of 0.22 kg. It is then filled with paint to a depth of 7mm from the top. Now the paint tin has a total mass of 6.50 kg. The density of the paint in kg m^{-3} is:
3.1
310
3100
31000
A solid steel cylinder has a diameter of 12 mm and a length of 85 mm. If the density of steel is 7800 kg m^{-3}, what is the mass in kg?
0.075
0.75
7.5
75
A bar of gold measures 20 cm × 8 cm × 5 cm. It density is 19 300 kg m^{-3}. What is its mass in kg?
0.154
1.54
15.4
154
An alloy tube of volume 1.8 × 10^{-4} m3 consists of 60 % aluminium and 40 % magnesium by volume. Which one of these statements about the mass of aluminium and magnesium is correct?
Mass of magnesium = 0.29 kg; Mass of magnesium = 0.12 kg.
Mass of magnesium = 0.12 kg; Mass of magnesium = 0.29 kg.
Mass of magnesium = 0.60 kg; Mass of magnesium = 0.40 kg.
Mass of magnesium = 0.40 kg; Mass of magnesium = 0.60 kg.
An alloy tube of volume 1.8 × 10^{-4} m3 consists of 60 % aluminium and 40 % magnesium by volume. What is the average density in kg m^{-3}? (Density of aluminium is 2700 kg m^{-3} and magnesium 1700 kg m^{-3})
1800
2100
2200
2300
Some furniture is made from chipboard. Which one of these is an advantage of chipboard?