# Quiz 1: Introduction

Physics & Astronomy

Q 1Q 1

Since 1983 the standard meter has been defined in terms of which of the following?
A)specific alloy bar housed at Sevres, France
B)wavelength of light emitted by krypton-86
C)distance from the Earth's equator to the North Pole
D)the distance light travels in a certain fraction of a second

Free

Multiple Choice

D

Q 2Q 2

Since 1967 the standard definition for the second has been based on which of the following?
A)characteristic frequency of the cesium-133 atom
B)average solar day
C)sidereal day
D)Greenwich Civil Time

Free

Multiple Choice

A

Q 3Q 3

In mechanics, physicists use three basic quantities to derive additional quantities.Mass is one of the three quantities.What are the other two?
A)length and force
B)power and force
C)length and time
D)force and time

Free

Multiple Choice

C

Q 4Q 4

The prefixes which are abbreviated p, n, and G represent which of the following?
A)10

^{-2}, 10^{-6}, and 10^{15}B)10^{-9}, 10^{6}, and 10^{10}C)10^{-12}, 10^{-9}, and 10^{9}D)10^{-15}, 10^{-6}, and 10^{12}Free

Multiple Choice

Free

Multiple Choice

Q 6Q 6

One year is about ____ seconds while one day is exactly ____ seconds.
A)3.16 * 10

^{7}, 86 400 B)5.26 * 10^{5}, 86 400 C)3.16 * 10^{7}, 8 640 D)1.04 * 10^{6}, 36 000Free

Multiple Choice

Q 7Q 7

The nuclei of atoms contain:
A)electrons only.
B)neutrons only.
C)protons and electrons.
D)protons and neutrons.

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Multiple Choice

Q 8Q 8

When was the existence of the neutron confirmed?
A)in ancient times
B)in 1895
C)in 1932
D)in 1969

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Multiple Choice

Q 9Q 9

The proton contains which of the following combination of quarks?
A)two up quarks and one down quark
B)one up quark and two down quarks
C)one top quark and two bottom quarks
D)two top quarks and one bottom quark

Free

Multiple Choice

Q 10Q 10

Which formula is dimensionally consistent with an expression yielding a value for velocity? (a is acceleration, x is distance, and t is time)
A)v/t

^{2}B)vx^{2}C)v^{2}/t D)atFree

Multiple Choice

Q 11Q 11

Which expression is dimensionally consistent with an expression that would yield a value for time

^{-1}? (v is velocity, x is distance, and t is time) A)v/x B)v^{2}/x C)x/t D)v^{2}tFree

Multiple Choice

Q 12Q 12

If the displacement of an object, x, is related to velocity, v, according to the relation x = Av, the constant, A, has the dimension of which of the following?
A)acceleration
B)length
C)time
D)area

Free

Multiple Choice

Q 13Q 13

The speed of a boat is often given in knots.If a speed of 5 knots were expressed in the SI system of units, the units would be:
A)m.
B)s.
C)m/s.
D)kg/s.

Free

Multiple Choice

Q 14Q 14

If a is acceleration, v is velocity, x is position, and t is time, then which equation is not dimensionally correct?
A)t = x/v
B)a = v

^{2}/x C)v = a/t D)t^{2}= 2x/aFree

Multiple Choice

Q 15Q 15

Suppose an equation relating position, x, to time, t, is given by x = b t

^{3}+ c t^{4}, where b and c are constants.The dimensions of b and c are respectively: A)T^{3}, T^{4}. B)1/T^{3}, 1/T^{4}. C)L/T^{3}, L/T^{4}. D)L^{2}T^{3}, L^{2}T^{4}.Free

Multiple Choice

Q 16Q 16

Areas always have dimensions ____ while volumes always have dimensions ____.
A)m

^{2}, m^{3}B)L^{2}, L^{3}C)Both a and b are correct. D)No answer is correct because of the "always".Free

Multiple Choice

Q 17Q 17

Which one of the choices below represents the preferred practice regarding significant figures when adding the following: 12.4 + 11 + 67.37 + 4.201?
A)94.971
B)94.97
C)95.0
D)95

Free

Multiple Choice

Q 18Q 18

Which one of the choices below represents the preferred practice regarding significant figures when multiplying the following: 10.5 * 8.8 * 3.14?
A)290
B)290.136
C)290.1
D)300

Free

Multiple Choice

Q 19Q 19

Calculate (0.82 + 0.042) * (4.4 * 10

^{3}), keeping only significant figures. A)3 800 B)3 784 C)3 793 D)3 520Free

Multiple Choice

Q 20Q 20

The length and width of a standard sheet of paper is measured, and then the area is found by calculation to be 93.50 in

^{2}.The number of significant figures in the width measurement must be at least: A)1. B)2. C)3. D)4.Free

Multiple Choice

Free

Multiple Choice

Q 22Q 22

Multiplying a 2 significant figure number by a 3 significant figure number and then dividing the product by a six significant figure number yields a number with how many significant figures?
A)5/6
B)1
C)2
D)11

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Multiple Choice

Q 23Q 23

On planet Q the standard unit of volume is called the guppy.Space travelers from Earth have determined that one liter = 38.2 guppies.How many guppies are in 150 liters?
A)5 730 guppies
B)0.255 guppies
C)3.93 guppies
D)188 guppies

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Multiple Choice

Q 24Q 24

On planet Z, the standard unit of length is the foose.Ann the Astronaut is 5.90 feet tall on earth.She lands on planet Z and is measured to be 94 foosi tall.Her partner Rachael is 88 foosi tall.How tall is Rachael on Earth?
A)5.2 feet
B)5.5 feet
C)5.8 feet
D)6.3 feet

Free

Multiple Choice

Q 25Q 25

A furlong is a distance of 220 yards.A fortnight is a time period of two weeks.A race horse is running at a speed of 5.00 yards per second.What is his speed in furlongs per fortnight?
A)27 500 furlongs/fortnight
B)13 700 furlongs/fortnight
C)6 220 furlongs/fortnight
D)2 750 furlongs/fortnight

Free

Multiple Choice

Q 26Q 26

A cereal box has the dimensions of 0.19 m * 0.28 m * 0.070 m.If there are 3.28 feet per meter, then what is the volume of the box in cubic feet?
A)0.13 cubic feet
B)0.040 cubic feet
C)0.012 cubic feet
D)0.003 7 cubic feet

Free

Multiple Choice

Q 27Q 27

The distance to the Andromeda Galaxy is estimated at about 2 * 10

^{6}light years.A light year is the distance traveled by light in one year; if the speed of light is 3 * 10^{8}m/s, about how far is it from our galaxy to Andromeda? (1 year = 3.15 * 10^{7}s) A)10 * 10^{15}m B)1 * 10^{18}m C)2 * 10^{22}m D)6 * 10^{12}mFree

Multiple Choice

Q 28Q 28

A cement truck can pour 20 cubic yards of cement per hour.Express this in ft

^{3}/min. A)1/3 ft^{3}/min B)1.0 ft^{3}/min C)3 ft^{3}/min D)9 ft^{3}/minFree

Multiple Choice

Q 29Q 29

Water flows into a swimming pool at the rate of 8.0 gal/min.The pool is 16 ft wide, 32 ft long and 8.0 ft deep.How long does it take to fill? (1 U.S.gallon = 231 cubic inches)
A)32 hours
B)64 hours
C)48 hours
D)24 hours

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Multiple Choice

Q 30Q 30

When NASA was communicating with astronauts on the moon, the time from sending on the Earth to receiving on the moon was 1.28 s.Find the distance from Earth to the moon.(The speed of radio waves is 3.00 * 10

^{8}m/s.) A)240 000 km B)384 000 km C)480 000 km D)768 000 kmFree

Multiple Choice

Q 31Q 31

The mass of the sun is 2.0 * 10

^{30}kg, and the mass of a hydrogen atom is 1.67 * 10^{-27}kg.If we assume that the sun is mostly composed of hydrogen, how many atoms are there in the sun? A)1.2 * 10^{56}atoms B)3.4 * 10^{56}atoms C)1.2 * 10^{57}atoms D)2.4 * 10^{57}atomsFree

Multiple Choice

Q 32Q 32

The information on a one-gallon paint can is that the coverage, when properly applied, is 450 ft

^{2}.One gallon is 231 in^{3}.What is the average thickness of the paint in such an application? A)0.003 6 in B)0.009 0 in C)0.043 in D)0.051 inFree

Multiple Choice

Q 33Q 33

Assume everyone in the United States consumes one soft drink in an aluminum can every two days.If there are 270 million Americans, how many tons of aluminum need to be recycled each year if each can weighs 1/16 pound and one ton = 2000 pounds?
A)750 000 tons
B)1.5 million tons
C)1.75 million tons
D)3 million tons

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Multiple Choice

Q 34Q 34

A physics class in a large lecture hall has 150 students.The total mass of the students is about ____ kg.
A)10

^{2}B)10^{3}C)10^{4}D)10^{5}Free

Multiple Choice

Q 35Q 35

An apartment has 1100 ft

^{2}of floor space.What is the approximate volume of the apartment? A)10^{3}ft^{3}B)10^{4}ft^{3}C)10^{5}ft^{3}D)10^{6}ft^{3}Free

Multiple Choice

Free

Multiple Choice

Q 37Q 37

Each edge of a cube has a length of 25.4 cm.What is the length of a diagonal of the cube going through the center of the cube?
A)25.4 in
B)17.3 in
C)14.4 in
D)10.0 in

Free

Multiple Choice

Q 38Q 38

If point A is located at coordinates (5, 3) and point B is located at coordinates (-3, 9), what is the distance from A to B if the units of the coordinated system are meters?
A)14 m
B)10 m
C)8 m
D)17 m

Free

Multiple Choice

Q 39Q 39

A high fountain of water is in the center of a circular pool of water.You walk the circumference of the pool and measure it to be 150 meters.You then stand at the edge of the pool and use a protractor to gauge the angle of elevation of the top of the fountain.It is 55.How high is the fountain?
A)17 m
B)23 m
C)29 m
D)34 m

Free

Multiple Choice

Q 40Q 40

A right triangle has sides 5.0 m, 12 m, and 13 m.The smallest angle of this triangle is nearest:
A)21.
B)23.
C)43.
D)Not attainable since this is not a right triangle.

Free

Multiple Choice

Q 41Q 41

If j = 90 - q, what is the value of sin

^{2}j + sin^{2}q? A)0 B)1 C)-1 D)The answer depends on q.Free

Multiple Choice

Q 42Q 42

A triangle has sides of length 7.0 cm and 25 cm.If the triangle is a right triangle, which of the following could be the length of the third side?
A)18 cm
B)24 cm
C)27 cm
D)32 cm

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Multiple Choice

Q 43Q 43

A train slowly climbs a 500-m mountain track which is at an angle of 10.0 with respect to the horizontal.How much altitude does it gain?
A)86.8 m
B)88.2 m
C)341 m
D)492 m

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Multiple Choice

Q 44Q 44

Note the expression: y = x

^{2}.Which statement is most consistent with this expression? A)if y doubles, then x quadruples B)y is greater than x C)if x doubles, then y doubles D)if x doubles, then y quadruplesFree

Multiple Choice

Q 45Q 45

Note the expression: y = A/x

^{3}.Which statement is most consistent with this expression? A)y is less than A B)if x is halved, y is multiplied by eight C)if x is doubled, y is multiplied by a factor of 8 D)y is greater than xFree

Multiple Choice

Free

Multiple Choice

Q 47Q 47

Modern electroplaters can cover a surface area of 60.0 m

^{2 }with one troy ounce of gold (volume = 1.611 cm^{3}).What is the thickness of the electroplated gold? A)2.68 * 10^{-8}m B)1.34 * 10^{-9}m C)1.67 * 10^{-6}m D)3.33 * 10^{-7}mFree

Multiple Choice

Q 48Q 48

The basic function of an automobile's carburetor is to atomize the gasoline and mix it with air to promote rapid combustion.Assume that 30 cm

^{3}of gasoline is atomized into N spherical droplets.Each droplet has a radius of 2.0 * 10^{-5}m.Find the total surface area of these N spherical droplets. A)2 100 cm^{2}B)15 000 cm^{2}C)18 000 cm^{2}D)45 000 cm^{2}Free

Multiple Choice

Q 49Q 49

A circle has an area of 2.0 m

^{2}.A second circle has double the radius of the first.The area of the second circle is ____ times that of the first. A)0.50 B)2.0 C)4.0 D)8.0Free

Multiple Choice

Q 50Q 50

Doubling the radius of a sphere results in increasing its volume by a factor of
A)2
B)4
C)8
D)8 p

Free

Multiple Choice

Q 51Q 51

A room in a house has a floor area of 120 ft

^{2}.Which of the following is most likely the approximate volume of the room? A)3 m^{3}B)30 m^{3}C)300 m^{3}D)3 000 m^{3}Free

Multiple Choice

Q 52Q 52

When SI units are plugged into an equation, it is found that the units balance.Which of the following can we expect to be true for this equation?
A)The equation will be dimensionally correct.
B)The equation will be dimensionally correct except sometimes in cases when the right hand side of the equation has more than one term.
C)The equation will not be dimensionally correct.
D)All constants of proportionality will be correct.

Free

Multiple Choice

Q 53Q 53

How long has it been that scientists have accepted that the nucleus of the atom consists of neutrons and protons? Think of your answers in terms of order of magnitude.
A)about a decade
B)about a century
C)about a thousand years
D)since Aristotle

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Multiple Choice

Q 54Q 54

Consider the sine of any angle between 30 and 40.If the angle were doubled, what would happen to the sine of the angle?
A)It would double.
B)It would more than double.
C)It would increase but be less than double.
D)In different cases, it could do any of the above.

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Multiple Choice

Q 55Q 55

There are other ways of expressing uncertainty besides significant figures.For example, suppose a quantity is known to have a value between 20.4 and 20.0 and our best estimate of the value is midrange at 20.2.We could write the number as 20.2 +/- 0.2 and say that the number has a 1% uncertainty.We would also say it has 3 significant figures.If we square a number with 1% uncertainty and 3 significant figures, what results?
A)A number with 1% uncertainty and 3 significant figures.
B)A number with 2% uncertainty and 3 significant figures.
C)A number with 2% uncertainty and 2 significant figures.
D)A number with 1% uncertainty and 2 significant figures.

Free

Multiple Choice