54 Questions
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When a chocolate bar is cut in half, its density is

Questions and Answers

- 1.Compared to a bar of pure gold, the density of a pure gold ring is
- A.
Less.

- B.
The same.

- C.
Slightly more.

- D.
Much more.

- 2.Which has the greater density, a lake full of water or a cup full of lake water?
- A.
The cup full of lake water

- B.
The lake full of lake water

- C.
Both have the same density.

- D.
It is impossible to tell without knowing the size of the lake.

- 3.Compared to the density of a kilogram of feathers, the density of a kilogram of lead is
- A.
Less.

- B.
More.

- C.
The same.

- 4.If a loaf of bread is compressed, its
- A.
Surface tension becomes less.

- B.
Molecules become harder.

- C.
Density decreases.

- D.
Density increases.

- E.
None of these

- 5.If the mass of an object were to double while its volume remains the same, its density would
- A.
Halve.

- B.
Double.

- C.
Stay the same.

- D.
Become four times as great.

- 6.If the volume of an object were to double while its mass stays the same, its density would
- A.
Halve.

- B.
Double.

- C.
Stay the same.

- D.
Become four times as great.

- 7.When weight is applied to the top of a stone arch, all of the stone blocks in the arch undergo
- A.
Tension.

- B.
Compression.

- C.
Expansion.

- D.
Change of phase.

- 8.When a chocolate bar is cut in half, its density is
- A.
Halved.

- B.
Unchanged.

- C.
Doubled.

- 9.When a load is placed on the middle of a horizontal beam supported at each end, the bottom part of the beam undergoes
- A.
Tension.

- B.
Compression.

- 10.You wish to bolt a sign to a horizontal I-beam supporting a bridge. You will weaken the beam least if you drill the bolt-holes through the
- A.
Upper flange.

- B.
Lower flange.

- C.
Web.

- D.
All these will have the same effect.

- 11.Compared to the volume of a kilogram of feathers, the volume of a kilogram of lead is
- A.
Less.

- B.
More.

- C.
The same.

- 12.Stone slabs are stronger under
- A.
Tension.

- B.
Compression.

- C.
Both tension and compression.

- 13.The strength of a rope depends on its
- A.
Thickness.

- B.
Length.

- C.
Both of these

- 14.Doubling the thickness (diameter) of a rope will multiply its strength by
- A.
1/2

- B.
1

- C.
2

- D.
3

- E.
4

- 15.If object A in your left hand and object B in your right hand both have the same weight density, then they
- A.
May have quite unequal mass densities.

- B.
Have equal mass densities.

- C.
Are equal in weight.

- 16.A wooden block has a mass of 1000 kg and a volume of 2 cubic meters. What is the block's density?
- A.
100 kg per cubic meter

- B.
200 kg per cubic meter

- C.
500 kg per cubic meter

- D.
1000 kg per cubic meter

- E.
None of these

- 17.A metal block has a mass of 5 grams and a volume of 1 cubic centimeter. A piece of the same kind of metal with a volume of 2 cubic centimeters has a density of
- A.
2.5 g/cc.

- B.
5 g/cc.

- C.
10 g/cc.

- 18.An iron block is placed in a furnace where it is heated and consequently expands. In the expanded condition, its density
- A.
Is less.

- B.
Is the same.

- C.
Is the same.

- 19.Which will bounce higher off a hard surface?
- A.
A rubber ball

- B.
A steel ball

- C.
Both bounce the same.

- 20.A strong spring is stretched 10 cm by a suspended weight. If the weight is doubled, the spring will stretch
- A.
No more.

- B.
Another 5 cm, making the total stretch 15 cm.

- C.
Another 10 cm, making the total stretch 20 cm.

- D.
Another 10 cm, making the total stretch 20 cm.

- E.
More than another 30 cm.

- 21.A spring is stretched 10 cm by a suspended 1-kg block. If two such springs side-by-side are used to suspend the block, so each spring supports half the weight of the block, then each spring will stretch
- A.
5 cm.

- B.
10 cm.

- C.
20 cm.

- D.
30 cm.

- E.
30 cm.

- 22.A weightless spring is stretched 10 cm by a suspended 1-kg block. If two such springs are used to suspend the block, one spring above the other, to effectively provide one double-length spring, then the total stretch of the double-length spring will be
- A.
5 cm.

- B.
5 cm.

- C.
20 cm.

- D.
30 cm.

- E.
None of these

- 23.A metal block has a density of 5000 kg per cubic meter and a volume of 2 cubic meters. What is the block's mass?
- A.
1000 kg

- B.
2500 kg

- C.
5000 kg

- D.
10,000 kg

- E.
None of these

- 24.A metal block has a density of 5000 kg per cubic meter and a mass of 15,000 kg. What is its volume?
- A.
0.33 cubic meters

- B.
3 cubic meters

- C.
5 cubic meters

- D.
15 cubic meters

- E.
None of these

- 25.An unstretched hanging spring is 50 cm long. Suspending a 100-N weight from it makes its length 60 cm. Adding another 100-N weight will make the spring's length
- A.
60 cm.

- B.
70 cm.

- C.
80 cm.

- D.
100 cm.

- E.
120 cm.

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