Question 1

How many nanoseconds does it take for a computer to perform one calculation if it performs   calculations per second?

Accepted Answer

A)  15 ns 
B)  67 ns 
C)  11 ns 
D)  65 ns 
A)  15 ns 
B)  67 ns 
C)  11 ns 
D)  65 ns

Question 2

0)0001776 can also be expressed as

Accepted Answer

A)  1.776 × 10-3. 
B)  1.776 × 10-4. 
C)  17.72 × 104. 
D)  1772 ×   . 
E)  177.2 × 107. 
A)  1.776 × 10-3. 
B)  1.776 × 10-4. 
C)  17.72 × 104. 
D)  1772 ×   . 
E)  177.2 × 107.

Question 3

If A > B,under what condition is |   -   | = A - B?

Accepted Answer

A)  The statement is never true. 
B)  Vectors   and   are in opposite directions. 
C)  Vectors   and   are in the same direction. 
D)  Vectors   and   re in perpendicular directions. 
E)  The statement is always true. 
A)  The statement is never true. 
B)  Vectors   and   are in opposite directions. 
C)  Vectors   and   are in the same direction. 
D)  Vectors   and   re in perpendicular directions. 
E)  The statement is always true.

Question 4

What is the sum of 1123 and 10.3 written with the correct number of significant figures?

Accepted Answer

A)  1.13 × 103 
B)  1133.3000 
C)  1.1 × 103 
D)  1133.3 
E)  1133 
A)  1.13 × 103 
B)  1133.3000 
C)  1.1 × 103 
D)  1133.3 
E)  1133

Question 5

If,in a parallel universe,π has the value 3.14149,express π in that universe to four significant figures.

Accepted Answer

A)  3.141 
B)  3.142 
C)  3.1415 
D)  3.1414 
A)  3.141 
B)  3.142 
C)  3.1415 
D)  3.1414

Question 6

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

Accepted Answer

A)  1.71 × 108 mg 
B)  1.71 × 109 mg 
C)  1.71 × 107 mg 
D)  1.71 × 106 mg 
A)  1.71 × 108 mg 
B)  1.71 × 109 mg 
C)  1.71 × 107 mg 
D)  1.71 × 106 mg

Question 7

The wavelength of a certain laser is   where   Express this wavelength in nanometers.

Accepted Answer

A)  3.5 × 102 nm 
B)  3.5 × 103 nm 
C)  3.5 × 101 nm 
D)  3.5 × 104 nm 
A)  3.5 × 102 nm 
B)  3.5 × 103 nm 
C)  3.5 × 101 nm 
D)  3.5 × 104 nm

Question 8

If   = +4   - 2   - 3   and   = -4   -2   - 3   ,which of the following numbers is closest to the magnitude of   -   ?

Accepted Answer

A)  8 
B)  7 
C)  9 
D)  10 
E)  11 
A)  8 
B)  7 
C)  9 
D)  10 
E)  11

Question 9

Approximately how many times does an average human heart beat in a year?

Accepted Answer

A)  4 ×   
B)  4 ×   
C)  4 ×   
D)  4 ×   
E)  4 ×   
A)  4 ×   
B)  4 ×   
C)  4 ×   
D)  4 ×   
E)  4 ×

Question 10

Vectors   and   are shown in the figure.Vector   is given by   =   -   .The magnitude of vector   is 16.0 units,and the magnitude of vector   is 7.00 units.What is the angle of vector   ,measured counterclockwise from the +x-axis?

Accepted Answer

A)  16.9° 
B)  22.4° 
C)  73.1° 
D)  287° 
E)  292° 
A)  16.9° 
B)  22.4° 
C)  73.1° 
D)  287° 
E)  292°

Question 11

0)00325 × 10-8 cm can also be expressed in mm as

Accepted Answer

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. 
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.

Question 12

If all the components of a vector are equal to 1,then that vector is a unit vector.

Accepted Answer

A) True 
 B)False

Question 13

The position x,in meters,of an object is given by the equation x = A + Bt + Ct2,where t represents time in seconds.What are the SI units of A,B,and C?

Accepted Answer

A)  m, m, m 
B)  m, s, s 
C)  m, s, s2 
D)  m, m/s, m/s2 
E)  m/s, m/s2, m/s3 
A)  m, m, m 
B)  m, s, s 
C)  m, s, s2 
D)  m, m/s, m/s2 
E)  m/s, m/s2, m/s3

Question 14

You walk 53 m to the north,then turn 60° to your right and walk another   Determine the direction of your displacement vector.Express your answer as an angle relative to east.

Accepted Answer

A)  63° N of E 
B)  50° N of E 
C)  57° N of E 
D)  69° N of E 
A)  63° N of E 
B)  50° N of E 
C)  57° N of E 
D)  69° N of E

Question 15

The scalar product of vector   = 3.00   + 2.00   and vector   is 10.0.Which of the following vectors could be vector   ?

Accepted Answer

A)  2.00   + 4.00   
B)  4.00   + 6.00   
C)  5.00   + 4.00   
D)  12.0   
E)  2.00   + 2.00   
A)  2.00   + 4.00   
B)  4.00   + 6.00   
C)  5.00   + 4.00   
D)  12.0   
E)  2.00   + 2.00

Question 16

What is   to the proper number of significant figures?

Accepted Answer

A)  0.91 
B)  0.911 
C)  0.9108 
D)  0.9 
A)  0.91 
B)  0.911 
C)  0.9108 
D)  0.9

Question 17

The components of vector   are   = + 3.90 and   = -4.00.What is the angle measured counterclockwise from the +x-axis to vector   ?

Accepted Answer

A)  314° 
B)  134° 
C)  224° 
D)  136° 
E)  46.0° 
A)  314° 
B)  134° 
C)  224° 
D)  136° 
E)  46.0°

Question 18

For the vectors shown in the figure,assume numbers are accurate to two significant figures.The scalar product   ×   is closest to

Accepted Answer

A)  zero. 
B)  16. 
C)  45. 
D)  -16. 
E)  -45. 
A)  zero. 
B)  16. 
C)  45. 
D)  -16. 
E)  -45.

Question 19

Express (4.3 × 106)-1/2 in scientific notation.

Accepted Answer

A)  4.8 × 10-4 
B)  2.1 × 103 
C)  2.1 × 10-5 
D)  2.1 × 104 
A)  4.8 × 10-4 
B)  2.1 × 103 
C)  2.1 × 10-5 
D)  2.1 × 104

Question 20

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

Accepted Answer

A)  0.7 m2. 
B)  0.68 m2. 
C)  0.682 m2. 
D)  0.6818 m2. 
E)  0.68175 m2. 
A)  0.7 m2. 
B)  0.68 m2. 
C)  0.682 m2. 
D)  0.6818 m2. 
E)  0.68175 m2.

Exam 1: Units,physical Quantities,and Vectors

How many nanoseconds does it take for a computer to perform one calculation if it performs calculations per second?

0)0001776 can also be expressed as

If A > B,under what condition is | - | = A - B?

What is the sum of 1123 and 10.3 written with the correct number of significant figures?

If,in a parallel universe,π has the value 3.14149,express π in that universe to four significant figures.

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

The wavelength of a certain laser is where Express this wavelength in nanometers.

If = +4 - 2 - 3 and = -4 -2 - 3 ,which of the following numbers is closest to the magnitude of - ?

Approximately how many times does an average human heart beat in a year?

Vectors and are shown in the figure.Vector is given by = - .The magnitude of vector is 16.0 units,and the magnitude of vector is 7.00 units.What is the angle of vector ,measured counterclockwise from the +x-axis?

0)00325 × 10-8 cm can also be expressed in mm as

If all the components of a vector are equal to 1,then that vector is a unit vector.

The position x,in meters,of an object is given by the equation x = A + Bt + Ct2,where t represents time in seconds.What are the SI units of A,B,and C?

You walk 53 m to the north,then turn 60° to your right and walk another Determine the direction of your displacement vector.Express your answer as an angle relative to east.

The scalar product of vector = 3.00 + 2.00 and vector is 10.0.Which of the following vectors could be vector ?

What is to the proper number of significant figures?

The components of vector are = + 3.90 and = -4.00.What is the angle measured counterclockwise from the +x-axis to vector ?

For the vectors shown in the figure,assume numbers are accurate to two significant figures.The scalar product × is closest to

Express (4.3 × 106)-1/2 in scientific notation.

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

Motion Along a Straight Line

Motion in Two or Three Dimensions

Newtons Laws of Motion

Applying Newtons Laws

Work and Kinetic Energy

Potential Energy and Energy Conservation

Momentum,impulse,and Collisions

Rotation of Rigid Bodies

Dynamics of Rotational Motion

Equilibrium and Elasticity

Fluid Mechanics

Gravitation

Periodic Motion

Mechanical Waves

Sound and Hearing

Temperature and Heat

Thermal Properties of Matter

The First Law of Thermodynamics

The Second Law of Thermodynamics

Electric Charge and Electric Field

Gausss Law

Electric Potential

Capacitance and Dielectrics

Current,resistance,and Electromotive Force

Direct-Current Circuits

Magnetic Field and Magnetic Forces

Sources of Magnetic Field

Electromagnetic Induction

Inductance

Alternating Current

Electromagnetic Waves

The Nature and Propagation of Light

Geometric Optics

Interference

Diffraction

Relativity

Photons: Light Waves Behaving As Particles

Particles Behaving As Waves

Quantum Mechanics

Atomic Structure

Molecules and Condensed Matter

Nuclear Physics

Particle Physics and Cosmology

Filters

0)00325 × 10^-8 cm can also be expressed in mm as

The position x,in meters,of an object is given by the equation x = A + Bt + Ct²,where t represents time in seconds.What are the SI units of A,B,and C?

Express (4.3 × 10⁶)^-1/2 in scientific notation.