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Quiz Session - Attempts With Random Questions

NLN PAX Exam Questions

Page 5 of 75

81.

Find the value of x by solving the following proportion.

x:6 = 3:9

  • 2

  • 3

  • 12

  • 18

Correct answer: 2

1. Rewrite the proportion as a fraction

x/6 = 3/9

2. Simplify 3/9 to 1/3

x/6 = 1/3

3. Multiply both sides by 6

x = 2

82.

Which of these best describes Newton's Third Law?

  • For every action there must be an equal and opposite reaction

  • A body at rest will stay at rest

  • A body in motion will stay in motion if there are no forces acting on it

  • Every action is governed by gravity

Correct answer: For every action there must be an equal and opposite reaction

Newton's Third Law states that for every action there must be an equal and opposite reaction.

Newton's First Law states that a body at rest will stay at rest and a body in motion will stay in motion if there are no forces acting on it.

83.

The conveyor belt is forcing the 534 kg piles of dirt up the hill at a rate of 8.9 m/s². What force is being used to allow this to occur?

  • 4,752.6N

  • 60N

  • 0.017N

  • 475.3N

Correct answer: 4,752.6N

The force that is required is 4,752.6N. The formula to find the required force is:

force = mass in kg × acceleration in m/s²

For this problem, force = 534 × 8.9 = 4,752.6N.

84.

If a bus drives for 30 minutes and travels 45 miles, what is the average speed of the bus?

  • 1.5 miles/minute

  • 0.67 miles/minute

  • 15 miles/minute

  • 0.15 miles/minute

Correct answer: 1.5 miles/minute

The average speed of the bus can be found by dividing its distance by the time it traveled:

Average speed = Distance/Time

The distance = 45 miles, and the time = 30 minutes; therefore, the average speed = 45 miles/30 minutes, or 1.5 miles/minute.

85.

Caitlyn was grading her students' exams. She had seven students who scored a 93, nine students who scored a 96, and three students who scored a 70. What was the average exam score in Caitlyn's class?

  • 90.79

  • 92.33

  • 86.33

  • 74.78

Correct answer: 90.79

To find the average, take the sum of the test scores and divide it by the number of students who took the test.

First find the sum of the test scores.

7(93) + 9(96) + 3(70) = 651 + 864 + 210 = 1,725

Next, find the total number of students who took the test.

7 + 9 + 3 = 19

Divide the sum of the test scores by the number of students to find the average.

1,725 ÷ 19 = ~90.79

86.

Dividing a number by 20 is the same as multiplying that number by what?

  • 1/20

  • 20/20

  • 20/1

  • 20

Correct answer: 1/20 

A variable x divided by 20 is x/20. Let's take each answer to find out which is equivalent to this value.

x × 20/20 = 20x/20 = x, so 20/20 is not the correct answer.

x × 20/1 = 20x/1 = 20x, so 20/1 is not the correct answer.

x × 20 = 20x, so 20 is not the correct answer.

x × 1/20 = x/20, so 1/20 is the correct answer. 

87.

Which of these is the correct formula for average speed?

  • Distance / Time

  • Time / Distance

  • (Distance forward - Distance backward) / Time

  • Time / (Distance forward - Distance backward)

Correct answer: Distance / Time

Average speed = Distance / Time

The average speed does not incorporate direction of travel into its equation. Speed is not directional; velocity is directional.

88.

Which of the following statements would be considered an opinion?

  • The politician is in over his head with this campaign

  • The politician has over twenty years of experience in law enforcement

  • The politician is married with two children

  • The politician was elected as a senator

Correct answer: The politician is in over his head with this campaign

When determining if a statement is a fact or an opinion, look for whether or not the statement can be verified. Often, opinions cannot be verified, while facts can. Also, look closely at the word choices to help you determine if it is a fact or an opinion. In this instance, it is an opinion that the politician is in over his head with the campaign.

89.

The prefix vice- would be used with a word part to indicate which of the following?

  • In place of

  • From or away

  • Not or without

  • Beneath

Correct answer: In place of

The prefix vice- would be used with a word part to indicate in place of. For example, vice president is in place of the president.

The prefix ab- is used to indicate from or away. The prefix an- is used to indicate not or without. The prefix infra- is used to indicate beneath.

90.

Solve:

-4|x - 2| = - 24

  • -4, 8

  • -8

  • 3

  • -4, 4

Correct answer: -4, 8

To solve the equation, first isolate the absolute value on one side of the equation.

-4|x - 2| = -24

|x - 2| = -24 ÷ -4 = 6. Now the equation can be expressed in two ways, x - 2 = 6 or x - 2 = -6

Solve both equations:

x - 2 = 6

x = 8

x - 2 = -6

x = -4

91.

Identify the meaning of endogenous in the following sentence.

We realize that endogenous forces of patriotism interact with endogenous regionalism in areas where people of multiple nations live in close proximity, complicating efforts to satisfy inhabitants of all areas.

  • Caused by factors inside the system.

  • Caused by factors outside the system.

  • Caused by external forces applying pressure to internal forces.

  • Caused by internal forces applying pressure to external forces.

Correct answer: Caused by factors inside the system.

Endogenous means caused by factors inside the system.

Exogenous means caused by external forces (outside the system). Neither term suggests pressure.

92.

The ________ of an organism is a demonstration of the genes expressed, rather than what they actually code for (genotype).

  • Phenotype

  • Stereotype

  • Classification

  • DNA

Correct answer: Phenotype

The phenotype of an organism is a demonstration of the genes expressed, rather than what they actually code for (genotype). The phenotype of an organism depends on which genes are dominant and on the interaction between genes and environment. The phenotype is the outward appearance of an organism or the expression of a genotype in the form of traits that can be seen and measured, such as hair or eye color.

The genotype is the genetic makeup of a cell, an organism, or an individual usually with reference to a specific characteristic under consideration.

93.

Average speed equals distance divided by which of the following?

  • Time

  • Displacement

  • Velocity

  • Friction

Correct answer: Time

Average speed equals distance divided by time. The primary element to understand is the formula to calculate average speed. This equation is:

Average Speed = Distance Traveled / Time of Travel

In other words, if we are given the rate at which someone is traveling and the time it takes to travel, we can then calculate the total distance traveled.

94.

Solve the following by adding.

3/9 + 2/9 =

  • 5/9

  • 2/3

  • 1/9

  • 2 1/3

Correct answer: 5/9

1. Simplify 3/9 to 1/3

1/3 + 2/9

2. Find the Least Common Denominator (LCD) of 1/3,2/9

Method 1: By Listing Multiples

List out all multiples of each denominator, and find the first common one.

3 : 3,6,9 9 : 9

Therefore, the LCD is 9.

Method 2: By Prime Factors

List all prime factors of each denominator, and find the union of these primes.

3 : 3 9 : 3,3

Therefore, the LCD is 3×3=9.

3. Make the denominators the same as the LCD

(1×3)/(3×3) + 2/9

4. Simplify - Denominators are now the same

3/9 + 2/9

5. Join the denominators

(3+2)/9

6. Simplify

5/9

95.

A triangle's three sides are labeled A, B, and C. A's length is 10, B's length is 15. If the perimeter of the triangle is 45, what is the length of side C?

  • 20

  • 15

  • 10

  • 25

Correct answer: 20

A perimeter is the distance around a two-dimensional shape. The perimeter of a triangle is the sum of its sides. First, add the two known sides together (A + B).

10 + 15 = 25

Subtract 25 from the total perimeter (45) to find the length of the third side (C).

45 - 25 = 20

96.

Within the neuromuscular system, which of the following allows the muscles to receive a signal and respond with the appropriate movement?

  • Receptors

  • Nerves

  • Axons

  • Myosin

Correct answer: Receptors

The neuromuscular system integrates muscles and nerves. This system affects every part of the body and is vital in controlling involuntary and voluntary movement.

Nerves are long bundles of nerve fibers (axons) that transmit signals from the central nervous system (CNS). These signals start as electrical impulses generate at the nerve cell end. The impulse travels along the axon and is transmitted to the next cell using chemical neurotransmitters secreted into the synapse from the axon terminals.

  • Afferent (sensory) neurons transmit sensory signals from receptors to the central nervous system. Afferent neurons are also known as sensory neurons.
  • Efferent (motor) neurons broadcast nerve impulses away from the central nervous system and to the effector organs.
  • Interneurons receive information from the afferent neurons and directs the information through the use of the efferent neurons.

The autonomic (involuntary) nervous system controls involuntary actions involving cardiac and smooth muscle, such as heart rhythm, breathing, and digestion. Voluntary nerve signals make skeletal muscles perform a deliberate action such as walking, running, writing, or typing.

Muscles contain long myofibrils made of sarcomere units, each consisting of long strands of proteins called actin (thin filaments) and myosin (thick filaments).

Skeletal muscles work by contracting. The nervous system sends a signal to a muscle. Actin and myosin proteins in the muscle slide past each other, creating a contraction or a relaxation of the muscle. These two motions are responsible for all muscle movement. Each muscle fiber is connected to a nerve fiber. Muscles respond to nerve impulses in specific ways. Receptors in muscles allow the muscles to receive a signal and respond with the appropriate movement.

97.

During the Krebs cycle of cellular respiration, glucose molecules are consumed. For every single consumed glucose molecule, what is produced?

  • Two ATP molecules, six carbon dioxide molecules, and six NADH molecules

  • Two ATP molecules and six carbon dioxide molecules

  • Six carbon dioxide molecules and six NADH molecules

  • Six ATP molecules, six carbon dioxide molecules, and six NADH molecules

Correct answer: Two ATP molecules, six carbon dioxide molecules, and six NADH molecules

For every single glucose molecule consumed during the Krebs cycle, two ATP molecules, six carbon dioxide molecules, and six NADH molecules are produced. The Krebs cycle occurs in the matrix of the mitochondria.

98.

What is the unit of measure for an electric charge?

  • Coulomb

  • Refraction

  • Newton

  • Joule

Correct answer: Coulomb

The unit of measure for an electric charge is a coulomb.

A refraction is not a unit of measure; it is the bending of waves as they pass at an angle from one medium to another. The unit of measure for kinetic energy is a joule. The unit of force is known as a newton.

99.

Define the following:

The constant of proportionality is equal to the mass of the object (F=ma)?

  • Newton's Second Law of Motion

  • Newton's Third Law of Motion

  • Newton's First Law of Motion

  • Law of Universal Gravitation

Correct answer: Newton's Second Law of Motion

The constant of proportionality is equal to the mass of the object (F=ma) is Newton's Second Law of Motion.

Newton's Third Law of Motion states that for every action there must be an equal and opposite reaction. Newton's First Law of Motion states that the body at rest will remain at rest, and the body in motion will remain in motion with a constant velocity, unless acted on by an unbalanced force (F=ka). Newton's Law of Universal Gravitation states that every object in the universe attracts every other object in the universe.

100.

A community owns 25 1/4 square miles of land. The community is composed of 16 families that wish to divide the land and share it equally. How many square miles will each family get?

  • 1 37/64 square miles

  • 2 1/4 square miles

  • 1 25/64 square miles

  • 2 25/64 square miles

Correct answer: 1 37/64 square miles

The size of the entire piece of land is 25 1/4 square miles. Each family gets 1/16 of this land. 

First, find the common denominator. Because 16 is a multiple of 4, 16 is the common denominator. 

Convert 25 1/4 to an improper fraction with a denominator of 16.

25 1/4 = (4 x 25) + 1 = 101/4 = (101 x 4)/(4 x 4) = 404/16

Multiply 404/16 by 1/16 to find the portion that each family will get.

(404 x 1)/(16 x 16) = 404/256

Simplify the fraction.

(404 ÷ 4)/(256 ÷ 4) = 101/64 = 1 37/64

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