Exam 8: Time and Time-Related Parameters

The energy that heats Earth is caused by nuclear reactions and explosions on the surface of the Sun, sometimes called "solar flares." When a solar flare occurs, how long does it take before you see it? (The Earth-Sun distance is $1.5 ^ { \times } 10 ^ { 11 } \mathrm {~m}$ and the speed of light is approximately $3 ^ { \times } 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$ ). a. 8 microseconds b. 8 milliseconds c. 8 seconds d. 8 minutes

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Question 1

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D

If a wheel, turning at a constant angular speed, makes ten complete revolutions every second, what is the angular speed, in revolutions per minute?

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Question 2

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$\omega = \frac { \Delta \theta } { \Delta _ { t } } = \frac { 10 \text { rev } } { 1 \mathrm { sec } } \left( \frac { 60 \mathrm { sec } } { 1 \mathrm {~min} } \right) = 600 \mathrm { rpm }$

If a wheel, turning at a constant angular speed, makes ten complete revolutions every second, what is the angular speed, in radians per second?

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Question 3

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$\omega = \frac { \Delta \theta } { \Delta _ { t } } = \frac { 10 \text { rev } } { 1 \mathrm { sec } } \left( \frac { 2 \pi _ { \text {rad } } } { 1 \text { rev } } \right) = 62.8 ~ { \mathrm { rad } } / \mathrm { sec }$

While filling up your car with gasoline, you notice that it takes 90 seconds to dispense 15 liters of gasoline.What is the average flow rate in lpm?

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Question 4

Which of the following control mechanisms in an automobile causes acceleration?

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Question 5

A tire 1 meter in diameter rotates at a constant rate of $100 \mathrm { rpm }$ .What is the speed of a small stone lodged in the tread of the tire on its outer edge? a. $5 \mathrm {~m} / \mathrm { s }$ b. $10 \mathrm {~m} / \mathrm { s }$ c. $20 \mathrm {~m} / \mathrm { s }$ $\text { d. } 100 \mathrm {~m} / \mathrm { s }$

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Question 6

The 60cm diameter front wheel of a motorcycle is spinning at 265 rpm without slipping as the motorcycle translates along.What is the translational speed of the motorcycle? a. $20 \mathrm { kmph }$ b. $30 \mathrm { kmph }$ c. $40 \mathrm { kmph }$ d. $50 \mathrm { kmph }$

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Question 7

A jiffy is the amount of time it takes light to travel one centimeter.If the speed of light is approximately $3 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$ , how many seconds are in a jiffy? a. $3.33 ^ { \times } 10 ^ { - 8 }$ b. $3.33 ^ { \times } 10 ^ { - 9 }$ c. $3.33 ^ { \times } 10 ^ { - 10 }$ d. $3.33 ^ { \times } 10 ^ { - 11 }$

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Question 8

A floating leaf bobs up and down two complete cycles each second as water waves pass by five meters apart.How fast are the waves moving? a. $10 \mathrm {~m} / \mathrm { s }$ b. $20 \mathrm {~m} / \mathrm { s }$ c. $30 \mathrm {~m} / \mathrm { s }$ d. $40 \mathrm {~m} / \mathrm { s }$

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Question 9

When the "A" string of a properly tuned violin is plucked, it takes 2.27ms to return to its starting position.What is the frequency of this oscillation?

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Question 10

Comparing average acceleration and instantaneous acceleration,

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Question 11

Comparing speed and velocity,

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Question 12

Ten seconds after starting from rest, a car is moving at 40ms .What is the car's acceleration in meters per second per second? a. $2 \mathrm {~m} / \mathrm { s } ^ { 2 }$ b. $4 \mathrm {~m} / \mathrm { s } ^ { 2 }$ c. $6 \mathrm {~m} / \mathrm { s } ^ { 2 }$ d. $8 \mathrm {~m} / \mathrm { s } ^ { 2 }$

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Question 13

A car traveling at constant speed as it rounds a curve is not experiencing angular acceleration.

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Question 14

A certain medical imaging device commonly referred to as "ultrasound" creates sound by oscillating with a period of $0.4 \mu _ { s }$ .What is the frequency of this oscillation?

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Question 15

Considering the equation $v = r \omega ,$ , explain why a fly swatter is more effective than trying to swat a fly with your bare hand.

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Question 16

A floating leaf bobs up and down two complete cycles each second as water waves pass by five meters apart.How fast are the waves moving? a. $1 \mathrm {~m} / \mathrm { s }$ b. $2 \mathrm {~m} / \mathrm { s }$ c. $5 \mathrm {~m} / \mathrm { s }$ d. $10 \mathrm {~m} / \mathrm { s }$

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Question 17

If the length of a vibrating string is increased, while all other parameters remain the same, the frequency of oscillation

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Question 18

A floating leaf bobs up and down two complete cycles each second as water waves pass by at a speed of $10 \mathrm {~m} / \mathrm { s }$ .How far apart are the waves?

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Question 19

The speed of sound in air is approximately $340 \mathrm {~m} / \mathrm { s } .$ .The speed of sound in steel is approximately $5900 \mathrm {~m} / \mathrm { s } .$ If your friend strikes one end of a steel pipe with a hammer while you listen at the other end, you will hear two distinct sounds: one traveling through the air and the other traveling through the steel pipe.If 1.94 seconds elapses between the two distinct sounds, how long is the steel pipe?

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Question 20

If a wheel, turning at a constant angular speed, makes ten complete revolutions every second, what is the angular speed, in revolutions per minute?

If a wheel, turning at a constant angular speed, makes ten complete revolutions every second, what is the angular speed, in radians per second?

While filling up your car with gasoline, you notice that it takes 90 seconds to dispense 15 liters of gasoline.What is the average flow rate in lpm?

Which of the following control mechanisms in an automobile causes acceleration?

The 60cm diameter front wheel of a motorcycle is spinning at 265 rpm without slipping as the motorcycle translates along.What is the translational speed of the motorcycle? a. $20 \mathrm { kmph }$ b. $30 \mathrm { kmph }$ c. $40 \mathrm { kmph }$ d. $50 \mathrm { kmph }$

A floating leaf bobs up and down two complete cycles each second as water waves pass by five meters apart.How fast are the waves moving? a. $10 \mathrm {~m} / \mathrm { s }$ b. $20 \mathrm {~m} / \mathrm { s }$ c. $30 \mathrm {~m} / \mathrm { s }$ d. $40 \mathrm {~m} / \mathrm { s }$

When the "A" string of a properly tuned violin is plucked, it takes 2.27ms to return to its starting position.What is the frequency of this oscillation?

Comparing average acceleration and instantaneous acceleration,

Comparing speed and velocity,

A car traveling at constant speed as it rounds a curve is not experiencing angular acceleration.

A certain medical imaging device commonly referred to as "ultrasound" creates sound by oscillating with a period of $0.4 \mu _ { s }$ .What is the frequency of this oscillation?

Considering the equation $v = r \omega ,$ , explain why a fly swatter is more effective than trying to swat a fly with your bare hand.

A floating leaf bobs up and down two complete cycles each second as water waves pass by five meters apart.How fast are the waves moving? a. $1 \mathrm {~m} / \mathrm { s }$ b. $2 \mathrm {~m} / \mathrm { s }$ c. $5 \mathrm {~m} / \mathrm { s }$ d. $10 \mathrm {~m} / \mathrm { s }$

If the length of a vibrating string is increased, while all other parameters remain the same, the frequency of oscillation

A floating leaf bobs up and down two complete cycles each second as water waves pass by at a speed of $10 \mathrm {~m} / \mathrm { s }$ .How far apart are the waves?

Introduction to the Engineering Profession

Preparing for an Engineering Career

Introduction to Engineering Design

Engineering Communication

Engineering Ethics

Fundamental Dimensions and Units

Length and Length-Related Parameters

Mass and Mass-Related Parameters

Force and Force-Related Parameters

Temperature and Temperature-Related Parameters Temperature As a Fundamental Dimension

Electric Current and Related Parameters

Energy and Power

Electronic Spreadsheets

Matlab

Engineering Drawings and Symbols

Engineering Materials

Mathematics in Engineering

Probability and Statistics in Engineering

Engineering Economics

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Exam 8: Time and Time-Related Parameters

If a wheel, turning at a constant angular speed, makes ten complete revolutions every second, what is the angular speed, in revolutions per minute?

If a wheel, turning at a constant angular speed, makes ten complete revolutions every second, what is the angular speed, in radians per second?

While filling up your car with gasoline, you notice that it takes 90 seconds to dispense 15 liters of gasoline.What is the average flow rate in lpm?

Which of the following control mechanisms in an automobile causes acceleration?

When the "A" string of a properly tuned violin is plucked, it takes 2.27ms to return to its starting position.What is the frequency of this oscillation?

Comparing average acceleration and instantaneous acceleration,

Comparing speed and velocity,

A car traveling at constant speed as it rounds a curve is not experiencing angular acceleration.

A certain medical imaging device commonly referred to as "ultrasound" creates sound by oscillating with a period of 0.4μs0.4 \mu _ { s }0.4μs​ .What is the frequency of this oscillation?

Considering the equation v=rω,v = r \omega ,v=rω, , explain why a fly swatter is more effective than trying to swat a fly with your bare hand.

If the length of a vibrating string is increased, while all other parameters remain the same, the frequency of oscillation

A floating leaf bobs up and down two complete cycles each second as water waves pass by at a speed of 10 m/s10 \mathrm {~m} / \mathrm { s }10 m/s .How far apart are the waves?

Introduction to the Engineering Profession

Preparing for an Engineering Career

Introduction to Engineering Design

Engineering Communication

Engineering Ethics

Fundamental Dimensions and Units

Length and Length-Related Parameters

Mass and Mass-Related Parameters

Force and Force-Related Parameters

Temperature and Temperature-Related Parameters Temperature As a Fundamental Dimension

Electric Current and Related Parameters

Energy and Power

Electronic Spreadsheets

Matlab

Engineering Drawings and Symbols

Engineering Materials

Mathematics in Engineering

Probability and Statistics in Engineering

Engineering Economics

Filters

A certain medical imaging device commonly referred to as "ultrasound" creates sound by oscillating with a period of $0.4 \mu _ { s }$ .What is the frequency of this oscillation?

Considering the equation $v = r \omega ,$ , explain why a fly swatter is more effective than trying to swat a fly with your bare hand.

A floating leaf bobs up and down two complete cycles each second as water waves pass by at a speed of $10 \mathrm {~m} / \mathrm { s }$ .How far apart are the waves?