Deck 12: Solids

Question 1

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.

Answer 1

web.

Question 2

The strength of a rope depends on its

A)thickness.
B)length.
C)both of these

Answer 2

thickness.

Question 3

Compared to the volume of a kilogram of feathers,the volume of a kilogram of lead is

A)less.
B)more.
C)the same.

Answer 3

less.

Question 4

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.

Question 5

Compared to the density of a kilogram of feathers,the density of a kilogram of lead is

A)less.
B)more.
C)the same.

Question 6

Use the following figure to answer the question :
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.

Question 7

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.

Question 8

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

A)halved.
B)unchanged.
C)doubled.

Question 9

Doubling the thickness (diameter)of a rope will multiply its strength by

A)1/2.
B)1)
C)2)
D)3)
E)4)

Question 10

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.

Question 11

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

Question 12

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 30 cm,making the total stretch 40 cm.
E)more than another 30 cm.

Question 13

Use the following figure to answer the question:
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.

Question 14

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.

Question 15

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.

Question 16

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 more.

Question 17

Which will bounce higher off a hard surface?

A)a rubber ball
B)a steel ball
C)Both bounce the same.

Question 18

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.

Question 19

Stone slabs are stronger under

A)tension.
B)compression.
C)both tension and compression.

Question 20

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

Question 21

If an elephant grows to twice its normal height,its weight will be multiplied by about

A)2)
B)4)
C)6)
D)8)
E)none of these

Question 22

When a living cell doubles in diameter,the amount of its material to be nourished is multiplied by eight,but the amount of membrane through which to feed it is multiplied by

A)2)
B)4)
C)8)
D)more than 8.

Question 23

If an elephant grew to twice its height,the area of its ears would be about

A)twice what it was.
B)four times what it was.
C)six times what it was.
D)eight times what it was.
E)none of these

Question 24

Which cooks faster in boiling oil?

A)a whole potato.
B)a sliced potato.
C)Both cook the same.

Question 25

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)10 cm.
C)20 cm.
D)30 cm.
E)none of these

Question 26

A dome-shaped house is more heat efficient than a rectangular house because a dome has

A)no corners to radiate.
B)less inner space.
C)less area compared to its volume.
D)all of these
E)none of these

Question 27

Use the following figure to answer the question:
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)none of these

Question 28

Which potatoes when peeled produce the most peelings?

A)10 kg of large potatoes
B)10 kg of small potatoes
C)They both produce the same amount.

Question 29

Tripling the linear size of an object multiplies its area by

A)3 and its volume by 9.
B)9 and its volume by 18.
C)9 and its volume by 27.
D)27 and its volume by 81.
E)none of these

Question 30

Which geometrical shape has the least surface area for a given volume?

A)cube
B)pyramid
C)cylinder
D)sphere
E)none of these

Question 31

An elephant eats less for its size than smaller animals because

A)its ears are bigger.
B)its radiating area is small compared to its volume.
C)its radiating area is large compared to its volume.
D)it is taller than other animals.
E)it weighs more than smaller animals.

Question 32

A kilogram of peaches have more skin area than a kilogram of

A)blueberries.
B)grapefruits.
C)grapes.
D)Each has the same skin area.

Question 33

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.

Question 34

Which has more skin compared to its body weight,an elephant or a mouse?

A)elephant
B)mouse
C)typically,both the same

Question 35

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

Question 36

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

Question 37

Suppose all sized potatoes are selling at the same price per kilogram.If you peel them for mashing,you will get more potato for your money if you buy

A)small potatoes.
B)medium potatoes.
C)large potatoes.
D)makes no difference

Question 38

Which has more skin,an elephant or a mouse?

A)elephant
B)mouse
C)typically,both the same

Question 39

A solid glass ball weighs 1 newton.One with twice the diameter weighs

A)1 N.
B)2 N.
C)3 N.
D)4 N.
E)more than 4 N.

Question 40

Doubling the linear size of an object multiplies its area by

A)2 and its volume by 4.
B)4 and its volume by 8.
C)8 and its volume by 16.
D)none of these

Question 41

Consider the fictional case of the incredible shrinking man.If he shrinks proportionately to 1/10 his original height,his weight will be multiplied by

A)0)1.
B)0)01.
C)0)001.
D)0)0001.
E)none of these

Question 42

If you make cupcakes and bake them as directed for a cake,you will find the cupcakes

A)overbaked.
B)underbaked.
C)properly baked.

Question 43

Eight little spheres of mercury coalesce to form a single sphere.Compared to the combined surface areas of the eight little spheres,the surface area of the big sphere is

A)one eighth.
B)one quarter.
C)one half.
D)the same.
E)double.

Question 44

If each dimension of a steel bridge is scaled up ten times,its strength will be multiplied by about

A)ten and its weight by ten also.
B)one hundred,but its weight by one thousand.
C)one thousand,and its weight by one hundred.
D)none of these

Question 45

In cold weather,your hands will be warmer if you wear

A)gloves.
B)mittens.
C)Both will be the same.

Question 46

If a pencil's length and diameter are both multiplied by 10,then its volume is multiplied by

A)10.
B)100.
C)1000.
D)10,000.
E)none of these

Question 47

Consider the fictional case of the incredible shrinking woman.If her height shrinks to 0.1 times her original height,then her total skin area shrinks to

A)0)1 times its original value.
B)0)01 times its original value.
C)0)001 times its original value.
D)0)0001 times its original value.
E)none of these

Question 48

A candymaker is making taffy apples.If she buys 100 kg of small apples rather than 100 kg of large apples,she will need

A)less taffy.
B)more taffy.
C)the same amount of taffy.

Question 49

The effects of scaling are beneficial to small creatures

A)that get wet.
B)that fall from great heights.
C)who are hungry.
D)all of these
E)none of these

Question 50

Eight little spheres of mercury coalesce to form a single sphere.Compared to the combined surface areas of the eight little spheres,the surface area of the big sphere is

A)less.
B)the same.
C)greater.

Question 51

The effects of scaling are beneficial to swimmers who are relatively

A)large.
B)small.
C)doesn't really benefit either

Question 52

In cooking a turkey in a conventional oven at a given temperature,compared to a medium-sized turkey,a large turkey takes

A)more time per pound to cook.
B)less time per pound to cook.
C)the same time per pound to cook.

Question 53

Flatten a spherical meatball into a hamburger and you increase its

A)surface area.
B)volume.
C)both of the above
D)none of the above

Question 54

Compared to a 50-kg person,a 100-kg person at the beach requires

A)more than twice as much suntan lotion.
B)the same amount of suntan lotion.
C)less than twice as much suntan lotion.