An engineer is examining two machines being used to produce plastic. Machine A has a maximum output power of 1100 watts W and loses 2868 calories per minute cal as heat. min Machine B has an input power of 1.75 horsepower [hp] and loses 1877 British BTU Thermal Units per hour as heat. Complete the following sentences to make them true. (a) The machine with the highest efficiency is (b) The efficiency of the machine chosen in part (a), given as a percentage [%] is
An engineer is examining two machines being used to produce plastic. Machine A has a maximum output power of 1100 watts W and loses 2868 calories per minute cal as heat. min Machine B has an input power of 1.75 horsepower [hp] and loses 1877 British BTU Thermal Units per hour as heat. Complete the following sentences to make them true. (a) The machine with the highest efficiency is (b) The efficiency of the machine chosen in part (a), given as a percentage [%] is
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter18: Heat Engines, Entropy, And The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 42P
Related questions
Question
Please show all your work and formulas you use to resolve the problem. Please be clear on your answer. Attached is the formula and all you need to resolve the problem
![An engineer is examining two machines being used to produce plastic.
Machine A has a maximum output power of 1100 watts W and loses 2868 calories
per minute
cal
as heat.
min
Machine B has an input power of 1.75 horsepower [hp] and loses 1877 British
BTU
Thermal Units per hour
as heat.
h
Complete the following sentences to make them true,
(a) The machine with the highest efficiency is
(b) The efficiency of the machine chosen in part (a), given as a percentage [%] is](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdcb50413-80d6-469c-93cd-08f16902242b%2F0c3a5880-c523-40ab-9618-ef6312780bbe%2Fpfpx3og_processed.jpeg&w=3840&q=75)
Transcribed Image Text:An engineer is examining two machines being used to produce plastic.
Machine A has a maximum output power of 1100 watts W and loses 2868 calories
per minute
cal
as heat.
min
Machine B has an input power of 1.75 horsepower [hp] and loses 1877 British
BTU
Thermal Units per hour
as heat.
h
Complete the following sentences to make them true,
(a) The machine with the highest efficiency is
(b) The efficiency of the machine chosen in part (a), given as a percentage [%] is
![43.59
Unit Conversion Table
SI Prefixes and Dimensions Table
Angle
I rad
E rad
Power
I hp
SI Prefixes
Example: 1 milligram (mgl - 1 x 10 grams (K
57.3
deg
deg
745.7
BTU / h
Example: 1 Megajoule (MJ] - 1x 10 joules J
Numbers Greater Than One
180
3.412
Numbers Less Than One
0.00134
hp
cal / min
A Ib /
Prefix
Abreviation
Prefi
I W
Power of 10
Prefix
Power of 10
Prefis
Area
14.34
Abbreviation
4,047
0.00156
1 acre
m
0.7376
deci-
deca
da
mi
-2
centi-
2
hecto-
1 m
640
Pressure
acre
-3
milli-
m
kilo
o-
k
1.01325
bar
Energy
I BTU
I cal
-6
Mega
M
33.9
micro
1,055.06
29.92
in Hg
mm Hg
-9
nano
Giga-
4.184
I atm
760
-12
pico-
12
Tera-
0.239
cal
101,325
Pa
-15
femto
15
Peta-
P
9.48x 10 BTU
0.7376
3,600,000 J
14.7
psi
t Iby
-18
atto-
18
Exa-
I kW h
Time
-21
Zetta-
zepto
21
24
Force
-24
yocto
24
Yotta-
Y
60
min
0.225
Ib
I min
I yr
IN
60
1x 10 dyne
Iby
Fundamental Dimensions and Base SI Units
365
I kip
1,000
Temperature Change
I electric current A ampere
N amount
Imoll mole
Length
"C
J light intensity
[ed] candela
T time
|s) second
Im
3.28
IK
1.8
"F
1 km
0.621
mi
1 in
1.8
"R
L length
[m] meter
e temperature
[K) kelvin
2.54
12
in
Volume
M mass
[kgl kilogram
5,280
3.785
L
1mi
I gal
1.609
km
qt
Common Derived, Named Units in the SI System
Dimension SI Unit Derived From
1 yd
1,000
em' or ce
0.264
Base SI Units Dimension
gal
IL
Dimensions
Mass
0.0353
ML
F-ma
newton [N] Force imass jacceleration
IN- 1
I kg
I Ib.
I slug
1 ton (metric
1 ton (US
2.205
Ib
33.8
Force
(F)
16
I ml
I m
em' or ec
32.2
Ib
1,000
L
ML?
E-Fd
Energy (forece) distance)
1J-1Nm -1
2,204.62
Ib
Energy (E) joule
16
pt
1 qt
2,000
Ib
2
pt
ML?
P-E/t
(P) watt (W] Pwereneng / time
1w -1!-1
Power
Named Units
1 (A s) / V
1 (V s) / A
farad
IF
pascal
1 Pa
IN/m
M
1 Pa - 1-1
P-P/A
Pressure (P) pascal Pa] Pressure force) / (area)
henry
1H
poise
1P
1g/ fem s)
1 cm /s
LT2
hertz
1 Hz
stoke
1St
1 V
V-P/I
1 v -1-1
ML
joule
1J
INm
volt
1W/A
Voltage (V) volt
M
Voltage - (power) / teurrent
newton
1 (kg m) / s
1 W
IN
watt
1J/s
ohm
1V/A
Thinking Like an Engineer de
Active Learning Approsch
Thinking Like an Engineer 4e
An Aetive Learning Approach
an P d
An
C h
C
Geometric Formulas and Physical Constants Table
Equations Table (in order of appearance in textbook
Geometric Formulas
Distance, Velocity and Acceleration
Newton's Second Law
8.1 Weight
(8.2)
Rectangle
b
Rectangular Parallelepiped
d-vt
F-m a
W =mg
Volumea be
Vat
Area ab
Perimeter - 2 a+2b
Surface Area2 (abaebe)
Density
8.3] Specifie Gravity
8.3 Specifie Weight
[8.3]
m
w
SG - Pobject
Pwater
Cirele
Sphere
Area
Volume -r
V
V
-
Molecular Weight
8.4 Molarity
Temperature F to "C
18.5
Circumference- 2r
Surface Area-4
m
MW =
M =
T(*F] – 32 T("C] – 0
Diameter 2r
180
100
Triangle
Right Circular Cone
Temperature: "C to K
8.5 Temperature: "P to "R
8.5 Pressure
[8.6)
F
Area -bH
Volume -wrH
T (K] - T["C] + 273
T('R] - T ("F] + 460
Torus
Right Circular Cylinder
Pancal's Law Hydestatie Presure R Pressure: Total
(8.6 deal Gas Law
18.7)
Volume H
Paydro = PgH
Potal - Pydro + Purface
PV-n RT
Volume - 2 Rr
Lateral Surface Area - 2r H
Energy: Work
8.8) Energy Potential
[8.8 Energy: Kinetie, translational 8.8
Physical Constants [Value and Units]
W - F Ax
PE - mg AH
KE == m Av
speed of light in a vacuum
3x 10
Energy: Thermal
18.8 Power
(8.9 Power
8.9
speed of sound in air (20 C
343.59
Q-m Cp AT
P==
Pn = Pout + Post
Euler number (base of natural logarithm) 2.71828..
elementary charge of an electron
1.602 x 10C
Efficiency
18. 10] Current, relaed to charge
8.11 Ohm's Law of Resistance 8.11
S
Pout
Pn
F Faraday's constant
9.65 x 10
Q-It
V-IR
9 polden ratio
1.61803..
Joule's First Law of Power 18.11] Capacitance, related to charge 8.11 Energy: Capacitor
8.11
g acceleration due to gravity
9.8 on Earth; 1.6on Earth's Moon
G gravitational constant
6.67 x 10
N
1
P-VI- -2R
R
Q-Cv
E cV?
k
1.38065 x 10
Inductance
18.11] Energy: Inductor
18.11| Hooke's Law for Spring
[12.3]
Boltzmann constant
6.022 x 10
IP
NA Avogadro number
V=L.
dt
F-kx
mal
* ratio of circle circumference to diameter
3.14159..
Newton's Law of Viscosity 12.3 Kinematic Viscosity
(12.3 Klastie Materials Yung Mduhan (13
R
ideal gas constant
0.08206 - 8314
melK
Δν
Ay
1-1본-1000분 62.4는
P
density of water](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdcb50413-80d6-469c-93cd-08f16902242b%2F0c3a5880-c523-40ab-9618-ef6312780bbe%2Fau2uubko_processed.jpeg&w=3840&q=75)
Transcribed Image Text:43.59
Unit Conversion Table
SI Prefixes and Dimensions Table
Angle
I rad
E rad
Power
I hp
SI Prefixes
Example: 1 milligram (mgl - 1 x 10 grams (K
57.3
deg
deg
745.7
BTU / h
Example: 1 Megajoule (MJ] - 1x 10 joules J
Numbers Greater Than One
180
3.412
Numbers Less Than One
0.00134
hp
cal / min
A Ib /
Prefix
Abreviation
Prefi
I W
Power of 10
Prefix
Power of 10
Prefis
Area
14.34
Abbreviation
4,047
0.00156
1 acre
m
0.7376
deci-
deca
da
mi
-2
centi-
2
hecto-
1 m
640
Pressure
acre
-3
milli-
m
kilo
o-
k
1.01325
bar
Energy
I BTU
I cal
-6
Mega
M
33.9
micro
1,055.06
29.92
in Hg
mm Hg
-9
nano
Giga-
4.184
I atm
760
-12
pico-
12
Tera-
0.239
cal
101,325
Pa
-15
femto
15
Peta-
P
9.48x 10 BTU
0.7376
3,600,000 J
14.7
psi
t Iby
-18
atto-
18
Exa-
I kW h
Time
-21
Zetta-
zepto
21
24
Force
-24
yocto
24
Yotta-
Y
60
min
0.225
Ib
I min
I yr
IN
60
1x 10 dyne
Iby
Fundamental Dimensions and Base SI Units
365
I kip
1,000
Temperature Change
I electric current A ampere
N amount
Imoll mole
Length
"C
J light intensity
[ed] candela
T time
|s) second
Im
3.28
IK
1.8
"F
1 km
0.621
mi
1 in
1.8
"R
L length
[m] meter
e temperature
[K) kelvin
2.54
12
in
Volume
M mass
[kgl kilogram
5,280
3.785
L
1mi
I gal
1.609
km
qt
Common Derived, Named Units in the SI System
Dimension SI Unit Derived From
1 yd
1,000
em' or ce
0.264
Base SI Units Dimension
gal
IL
Dimensions
Mass
0.0353
ML
F-ma
newton [N] Force imass jacceleration
IN- 1
I kg
I Ib.
I slug
1 ton (metric
1 ton (US
2.205
Ib
33.8
Force
(F)
16
I ml
I m
em' or ec
32.2
Ib
1,000
L
ML?
E-Fd
Energy (forece) distance)
1J-1Nm -1
2,204.62
Ib
Energy (E) joule
16
pt
1 qt
2,000
Ib
2
pt
ML?
P-E/t
(P) watt (W] Pwereneng / time
1w -1!-1
Power
Named Units
1 (A s) / V
1 (V s) / A
farad
IF
pascal
1 Pa
IN/m
M
1 Pa - 1-1
P-P/A
Pressure (P) pascal Pa] Pressure force) / (area)
henry
1H
poise
1P
1g/ fem s)
1 cm /s
LT2
hertz
1 Hz
stoke
1St
1 V
V-P/I
1 v -1-1
ML
joule
1J
INm
volt
1W/A
Voltage (V) volt
M
Voltage - (power) / teurrent
newton
1 (kg m) / s
1 W
IN
watt
1J/s
ohm
1V/A
Thinking Like an Engineer de
Active Learning Approsch
Thinking Like an Engineer 4e
An Aetive Learning Approach
an P d
An
C h
C
Geometric Formulas and Physical Constants Table
Equations Table (in order of appearance in textbook
Geometric Formulas
Distance, Velocity and Acceleration
Newton's Second Law
8.1 Weight
(8.2)
Rectangle
b
Rectangular Parallelepiped
d-vt
F-m a
W =mg
Volumea be
Vat
Area ab
Perimeter - 2 a+2b
Surface Area2 (abaebe)
Density
8.3] Specifie Gravity
8.3 Specifie Weight
[8.3]
m
w
SG - Pobject
Pwater
Cirele
Sphere
Area
Volume -r
V
V
-
Molecular Weight
8.4 Molarity
Temperature F to "C
18.5
Circumference- 2r
Surface Area-4
m
MW =
M =
T(*F] – 32 T("C] – 0
Diameter 2r
180
100
Triangle
Right Circular Cone
Temperature: "C to K
8.5 Temperature: "P to "R
8.5 Pressure
[8.6)
F
Area -bH
Volume -wrH
T (K] - T["C] + 273
T('R] - T ("F] + 460
Torus
Right Circular Cylinder
Pancal's Law Hydestatie Presure R Pressure: Total
(8.6 deal Gas Law
18.7)
Volume H
Paydro = PgH
Potal - Pydro + Purface
PV-n RT
Volume - 2 Rr
Lateral Surface Area - 2r H
Energy: Work
8.8) Energy Potential
[8.8 Energy: Kinetie, translational 8.8
Physical Constants [Value and Units]
W - F Ax
PE - mg AH
KE == m Av
speed of light in a vacuum
3x 10
Energy: Thermal
18.8 Power
(8.9 Power
8.9
speed of sound in air (20 C
343.59
Q-m Cp AT
P==
Pn = Pout + Post
Euler number (base of natural logarithm) 2.71828..
elementary charge of an electron
1.602 x 10C
Efficiency
18. 10] Current, relaed to charge
8.11 Ohm's Law of Resistance 8.11
S
Pout
Pn
F Faraday's constant
9.65 x 10
Q-It
V-IR
9 polden ratio
1.61803..
Joule's First Law of Power 18.11] Capacitance, related to charge 8.11 Energy: Capacitor
8.11
g acceleration due to gravity
9.8 on Earth; 1.6on Earth's Moon
G gravitational constant
6.67 x 10
N
1
P-VI- -2R
R
Q-Cv
E cV?
k
1.38065 x 10
Inductance
18.11] Energy: Inductor
18.11| Hooke's Law for Spring
[12.3]
Boltzmann constant
6.022 x 10
IP
NA Avogadro number
V=L.
dt
F-kx
mal
* ratio of circle circumference to diameter
3.14159..
Newton's Law of Viscosity 12.3 Kinematic Viscosity
(12.3 Klastie Materials Yung Mduhan (13
R
ideal gas constant
0.08206 - 8314
melK
Δν
Ay
1-1본-1000분 62.4는
P
density of water
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