객관식
Suppose an 80 kg (176 lb) person has 5.5 L of blood (1,060 kg/m3 ) in their body. How much of this person's total mass consists of blood? What percentage of the person's total mass is blood?
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Density
객관식
A wooden door is 1 m wide, 2.5 m tall, 6 cm thick, and weighs 400 N. What is the density of the wood in g/cm3? (use g = 10 m/s2)
A
0.0267 g/cm3
B
0.267 g/cm3
C
267 g/cm3
D
2670 g/cm3
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