# Quiz 1: Concepts of Motion

Physics & Astronomy

Q 1Q 1

The current definition of the standard meter of length is based on
A) the distance between the earth's equator and north pole.
B) the distance between the earth and the sun.
C) the distance traveled by light in a vacuum.
D) the length of a particular object kept in France.

Free

Multiple Choice

C

Q 2Q 2

The current definition of the standard second of time is based on
A) the frequency of radiation emitted by cesium atoms.
B) the earth's rotation rate.
C) the duration of one year.
D) the oscillation of a particular pendulum kept in France.

Free

Multiple Choice

A

Q 3Q 3

The current definition of the standard kilogram of mass is based on
A) the mass of the earth.
B) the mass of the sun.
C) the mass a particular object kept in France.
D) the mass of a cesium-133 atom.

Free

Multiple Choice

C

Q 4Q 4

If a woman weighs 125 lb, her mass expressed in kilograms is x kg, where x is
A) less than 125.
B) greater than 125.

Free

Multiple Choice

Q 5Q 5

If a tree is 15 m tall, its height expressed in feet is x ft, where x is
A) less than 15.
B) greater than 15.

Free

Multiple Choice

Q 6Q 6

If a flower is 6.5 cm wide, its width expressed in millimeters is x mm, where x is
A) less than 6.5.
B) greater than 6.5.

Free

Multiple Choice

Q 7Q 7

If an operatic aria lasts for 5.75 min, its length expressed in seconds is x s, where x is
A) less than 5.75.
B) greater than 5.75.

Free

Multiple Choice

Q 8Q 8

Scientists use the metric system chiefly because it is more accurate than the English system.
A) True
B) False

Free

Multiple Choice

Q 9Q 9

When adding two numbers, the number of significant figures in the sum is equal to the number of significant figures in the least accurate of the numbers being added.
A) True
B) False

Free

Multiple Choice

Q 10Q 10

When determining the number of significant figures in a number, zeroes to the left of the decimal point are never counted.
A) True
B) False

Free

Multiple Choice

Q 11Q 11

Convert 1.2 × 10

^{-3}to decimal notation. A) 1.200 B) 0.1200 C) 0.0120 D) 0.0012 E) 0.00012Free

Multiple Choice

Q 12Q 12

Write out the number 7.35 × 10

^{-5}in full with a decimal point and correct number of zeros. A) 0.00000735 B) 0.0000735 C) 0.000735 D) 0.00735 E) 0.0735Free

Multiple Choice

Q 13Q 13

0.0001776 can also be expressed as
A) 1.776 × 10

^{-3}. B) 1.776 × 10^{-4}. C) 17.72 × 10^{4}. D) 1772 × 10^{5}. E) 177.2 × 10^{7}.Free

Multiple Choice

Q 14Q 14

0.00325 × 10

^{-8}cm can also be expressed in mm as A) 3.25 × 10^{-12}mm. B) 3.25 × 10^{-11}mm. C) 3.25 × 10^{-10}mm. D) 3.25 × 10^{-9}mm. E) 3.25 × 10^{-8}mm.Free

Multiple Choice

Q 15Q 15

If, in a parallel universe, π has the value 3.14149, express π in that universe to four significant figures.
A) 3.141
B) 3.142
C) 3.1415
D) 3.1414

Free

Multiple Choice

Q 16Q 16

The number 0.003010 has
A) 7 significant figures.
B) 6 significant figures.
C) 4 significant figures.
D) 2 significant figures.

Free

Multiple Choice

Free

Multiple Choice

Q 18Q 18

What is the value of π(8.104)

^{2}, written with the correct number of significant figures? A) 206.324 B) 206.323 C) 206.3 D) 206 E) 200Free

Multiple Choice

Q 19Q 19

What is the sum of 1123 and 10.3 written with the correct number of significant figures?
A) 1.13 × 10

^{3}B) 1133.3000 C) 1.1 × 10^{3}D) 1133.3 E) 1133Free

Multiple Choice

Q 20Q 20

What is the sum of 1.53 + 2.786 + 3.3 written with the correct number of significant figures?
A) 8
B) 7.6
C) 7.62
D) 7.616
E) 7.6160

Free

Multiple Choice

Q 21Q 21

What is the difference between 103.5 and 102.24 written with the correct number of significant figures?
A) 1
B) 1.3
C) 1.26
D) 1.260
E) 1.2600

Free

Multiple Choice

Q 22Q 22

What is the product of 11.24 and 1.95 written with the correct number of significant figures?
A) 22
B) 21.9
C) 21.92
D) 21.918
E) 21.9180

Free

Multiple Choice

Q 23Q 23

What is the result of 1.58 ÷ 3.793 written with the correct number of significant figures?
A) 4.1656 ×
B) 4.166 ×
C) 4.17 ×
D) 4.2 ×
E) 4 ×

Free

Multiple Choice

Q 24Q 24

What is 34 + (3) × (1.2465) written with the correct number of significant figures?
A) 37.7
B) 37.74
C) 4 × 10

^{1}D) 38 E) 37.7395Free

Multiple Choice

Q 25Q 25

What is 56 + (32.00)/(1.2465 + 3.45) written with the correct number of significant figures?
A) 62.8
B) 62.812
C) 62.81
D) 63
E) 62.8123846

Free

Multiple Choice

Q 26Q 26

Add and and express your answer in milligrams (mg).
A) 7.05 × 10

^{7}mg B) 7.05 × 10^{4}mg C) 7.05 × 10^{5}mg D) 7.05 × 10^{6}mgFree

Multiple Choice

Q 27Q 27

Express (4.3 × 10

^{6})^{-1/2}in scientific notation. A) 4.8 × 10^{-4}B) 2.1 × 10^{3}C) 2.1 × 10^{-5}D) 2.1 × 10^{4}Free

Multiple Choice

Q 28Q 28

What is 0.205

^{2/3}, expressed to the proper number of significant figures? A) 0.348 B) 0.35 C) 0.3 D) 0.3477Free

Multiple Choice

Q 29Q 29

The length and width of a rectangle are 1.125 m and 0.606 m, respectively. Multiplying, your calculator gives the product as 0.68175. Rounding properly to the correct number of significant figures, the area should be written as
A) 0.7 m

^{2}. B) 0.68 m^{2}. C) 0.682 m^{2}. D) 0.6818 m^{2}. E) 0.68175 m^{2}.Free

Multiple Choice

Q 30Q 30

The following exact conversion equivalents are given: 1 m = 100 cm , 1 in = 2.54 cm, and If a computer screen has an area of 1.27 , this area is closest to
A) 0.00284 m

^{2}. B) 0.0465 m^{2}. C) 0.118 m^{2}. D) 0.284 m^{2}. E) 4.65 m^{2}.Free

Multiple Choice

Q 31Q 31

In addition to 1 m = 39.37 in., the following exact conversion equivalents are given: and 1 min = 60 s. If a particle has a velocity of 8.4 miles per hour, its velocity, in m/s, is closest to
A) 3.8 m/s.
B) 3.0 m/s.
C) 3.4 m/s.
D) 4.1 m/s.
E) 4.5 m/s.

Free

Multiple Choice

Q 32Q 32

A weight lifter can bench press How many milligrams (mg) is this?
A) 1.71 × 10

^{8}mg B) 1.71 × 10^{9}mg C) 1.71 × 10^{7}mg D) 1.71 × 10^{6}mgFree

Multiple Choice

Q 33Q 33

How many nanoseconds does it take for a computer to perform one calculation if it performs calculations per second?
A) 15 ns
B) 67 ns
C) 11 ns
D) 65 ns

Free

Multiple Choice

Q 34Q 34

The shortest wavelength of visible light is approximately 400 nm. Express this wavelength in centimeters.
A) 4 × 10

^{-5}cm B) 4 × 10^{-7}cm C) 4 × 10^{-9}cm D) 4 × 10^{-11}cm E) 400 × 10^{-11}cmFree

Multiple Choice

Q 35Q 35

The wavelength of a certain laser is where Express this wavelength in nanometers.
A) 3.5 × 10

^{2}nm B) 3.5 × 10^{3}nm C) 3.5 × 10^{1}nm D) 3.5 × 10^{4}nmFree

Multiple Choice

Q 36Q 36

A certain CD-ROM disk can store approximately 6.0 × 10

^{2}megabytes of information, where 10^{6}bytes = 1 megabyte. If an average word requires 9.0 bytes of storage, how many words can be stored on one disk? A) 6.7 × 10^{7}words B) 5.4 × 10^{9}words C) 2.1 × 10^{7}words D) 2.0 × 10^{9}wordsFree

Multiple Choice

Q 37Q 37

A plot of land contains How many square meters does it contain?
A) 2.3 × 10

^{4}m^{2}B) 7.1 × 10^{3}m^{2}C) 7.0 × 10^{4}m^{2}D) 5.0 × 10^{4}m^{2}Free

Multiple Choice

Q 38Q 38

A person on a diet loses in a week. How many are lost?
A) 2.6 × 10

^{3}μg/s B) 1.6 × 10^{5}μg/s C) 44 μg/s D) 6.4 × 10^{4}μg/sFree

Multiple Choice

Q 39Q 39

Albert uses as his unit of length (for walking to visit his neighbors or plowing his fields) the albert (A), the distance Albert can throw a small rock. One albert is How many square alberts is equal to one acre? (1 acre = 43,560 ft

^{2}= 4050 m^{2})Free

Short Answer

Q 40Q 40

Convert a speed of 4.50 km/h to units of ft/min. (1.00 m = 3.28 ft)
A) 0.246 ft/min
B) 82.3 ft/min
C) 165 ft/min
D) 246 ft/min
E) 886 ft/min

Free

Multiple Choice

Q 41Q 41

The exhaust fan on a typical kitchen stove pulls 600 CFM (cubic feet per minute) through the filter. Given that 1.00 in. = 2.54 cm, how many cubic meters per second does this fan pull?
A) 0.283 m

^{3}/sec B) 0.328 m^{3}/sec C) 3.05 m^{3}/sec D) 32.8 m^{3}/secFree

Multiple Choice

Free

Multiple Choice

Q 43Q 43

The height of the ceiling in a typical home, apartment, or dorm room is closest to
A) 100 cm.
B) 200 cm.
C) 400 cm.
D) 500 cm.

Free

Multiple Choice

Q 44Q 44

Approximately how many times does an average human heart beat in a year?
A) 4 ×
B) 4 ×
C) 4 ×
D) 4 ×
E) 4 ×

Free

Multiple Choice

Q 45Q 45

Approximately how many times does an average human heart beat in a lifetime?
A) 3 ×
B) 3 ×
C) 3 ×
D) 3 ×
E) 3 ×

Free

Multiple Choice

Q 46Q 46

Approximately how many pennies would you have to stack to reach an average 8-foot ceiling?
A) 2 ×
B) 2 ×
C) 2 ×
D) 2 ×
E) 2 ×

Free

Multiple Choice

Q 47Q 47

Estimate the number of times the earth will rotate on its axis during a human's lifetime.
A) 3 ×
B) 3 ×
C) 3 ×
D) 3 ×
E) 3 ×

Free

Multiple Choice

Q 48Q 48

Estimate the number of pennies that would fit in a box one foot long by one foot wide by one foot tall.
A) 5 ×
B) 5 ×
C) 5 ×
D) 5 ×
E) 5 ×

Free

Multiple Choice

Q 49Q 49

A marathon is and long. Estimate how many strides would be required to run a marathon. Assume a reasonable value for the average number of
A) 4.5 × 10

^{4}strides B) 4.5 × 10^{3}strides C) 4.5 × 10^{5}strides D) 4.5 × 10^{6}stridesFree

Multiple Choice

Q 50Q 50

The period of a pendulum is the time it takes the pendulum to swing back and forth once. If the only dimensional quantities that the period depends on are the acceleration of gravity, g, and the length of the pendulum, ℓ, what combination of g and ℓ must the period be proportional to? (Acceleration has SI units of m ∙ s

^{-2}.). A) g/ℓ B) gℓ^{2}C) gℓ D) E)Free

Multiple Choice

Q 51Q 51

The speed of a wave pulse on a string depends on the tension, F, in the string and the mass per unit length, μ, of the string. Tension has SI units of and the mass per unit length has SI units of What combination of F and μ must the speed of the wave be proportional to?
A) F / μ
B) μ / F
C)
D)
E)

Free

Multiple Choice

Q 52Q 52

The position x, in meters, of an object is given by the equation x = A + Bt + Ct

^{2}, where t represents time in seconds. What are the SI units of A, B, and C? A) m, m, m B) m, s, s C) m, s, s^{2}D) m, m/s, m/s^{2}E) m/s, m/s^{2}, m/s^{3}Free

Multiple Choice