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What is the efficiency of the boiler, expressed as a percentage

What is the efficiency of the boiler, expressed as a percentage

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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The input power to operate a boiler comes from an electrical circuit with a voltage of 110 volts [V] and a resistance of 3 ohms [2] The boiler produces 70 kilojoules of heat per minute kJ min What is the efficiency of the boiler, expressed as a percentage [%]
Transcribed Image Text:The input power to operate a boiler comes from an electrical circuit with a voltage of 110 volts [V] and a resistance of 3 ohms [2] The boiler produces 70 kilojoules of heat per minute kJ min What is the efficiency of the boiler, expressed as a percentage [%]
Unit Conversion Table SI Prefixes and Dimensions Table Angle 1 rad e rad SI Prefixes Example: 1 milligram (mg]- 1 x 10 grams (gd Power I hp 57.3 deg deg 745.7 Example: 1 Megajoule (MJ] - 1x 10 joules (J) Numbers Greater Than One 180 3.412 BTU / h Numbers Less Than One 0.00134 hp cal / min Prefix Abbreviation Prefix Abbreviation Area 1 W Power of 10 Prefix Power of 10 Prefis 14.34 4,047 m t Ib /s -1 deci- 1 deca - da 0.7376 1 acre 0.00156 mi -2 centi- hecto- h 1 mi 640 acre Pressure 3 milli- 3. kilo- k m 1.01325 bar r Mega Energy 1 BTU 33.9 t H0 -6 micro 6. M 1,055.06 J 1 atm 29.92 in Hg -9 nano Giga- I cal 4.184 J 760 mm Hg -12 pico- 12 Tera- т 0.239 cal 101,325 Pa 9.48 10 ITU 0.7376 1J -15 femto- 15 Peta- 14.7 psi t Ib -18 atto- 18 Exa- E 1 kW h 3,600,000 J Time -21 21 Zetta zepto- 1d 24 h Force -24 yocto- 24 Yotta- 1h 60 min 0.225 Ib 1 min I yr IN 60 1x 10 dyne Fundamental Dimensions and Base SI Units 365 I kip 1,000 Ib Temperature Change electric current A ampere N amount |mol) mole Length J light intensity Jed) candela T time Is] second 1m 3.28 ft IK 1.8 1 km 1 in 0.621 mi 1.8 "R L length (m] meter O temperature [K) kelvin 254 cm 12 Volume M mass in (kgl kilogram 5,280 ft 3.785 L 1 mi 1 pal 1.609 km 4 qt cm or ce Common Derived, Named Units in the SI System Base SI Units 1 yd 3 ft 1,000 SI Unit Derived From 0.264 gal Dimensions Dimension Mass 0.0353 ML F-ma (F) newton IN Force (mass (acceleration 1N - 1 I kg 1 Ib 1 shug 1 ton (metric 1 ton (US 2.205 Ib Force A oz cm or ce 33.8 16 oz I ml. 32.2 Ib 1 m 1,000 L. ML? Energy (E) joule E-Fd PI Energy (force) (distance) 1J-1N m -1 2,204.62 Ib 16 d oz pt I gt 2,000 Ib 2 pt ML? (P) watt (W 1w - 1!-1 Power Named Units Power - jenergyi / (time) farad 1 (A s) / V 1 (V s) / A pascal poise 1 Pa IN/ m 1g/ (cm s) 1 em /s Pressure (P) pascal (Pal Pressure force) / (area) P-F/A 1 Pa - 1-1 M henry 1P LT2 1H hertz I Ha 1 St stoke IN m 1 V V IWIA V-P/I Voltage - (power) / (current) ML? joule 1J 1Nm volt Voltage (V) volt 1V -1"-1 T'I 1 (kg m) / s 1v/A newton 1N watt 1 W 1J/s ohm 10 Thinking Like an Engineer 4e An Aetive Learning Agpproach Thinking Like an Engineer 4e An Aetive Learning Approach an. P Cte 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 18.2 Rectangular Parallelepiped Volume - abe Surface Area 2 (ab+aeb e) Rectangle d- vt F - m a w = mg Areaab v -at Perimeter - 2 a+ 2b Density 8.3 Specific Gravity [8.3] Specific Weight [8.3] SG = Pobject Pwater w m V Cirele Sphere Y= Arear Volume -r Molecular Weight 8.4 Molarity Temperature: "F to "C 18.5) Circumference - 2*r Surface Area4sr T[*F] – 32 T["C] – 0 Diameter- 2r MW = V 180 100 Triangle Right Cireular Cone Temperature: "C to K [8.5 Temperature: "F to "R [8.5 Pressure 18.6) Area-bH Volume -rH T (K] = T["C] + 273 T ("R] - T ("F] + 460 F P = Torus Right Circular Cylinder 8.6 ideal Gas Law 18.7) Pascals Law ydrostatic Presure R6 Pressure: Total Volume -r H Volume - 2 R Phydre PgH Protal - Pydre + Purface PV-n RT 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? 3x 10 speed of light in a vacuum Energy: Thermal [8.8 Power 8.9 Power 8.9) speed of sound in air (20 "C) 343.59 E Q-m Cp AT P = Pout + Post Euler number (base of natural logarithm) 2.71828.. e elementary charge of an electron 1.602 x 10 "C 9.65 x 10 Efficiency [8.10 Current, elated t charge [8.11) Ohm's Law of Resistance [8.11] F Faraday's constant Pout Pin Q-It V-IR golden ratio 1.61803.. Joule's First Law of Power [8.11 Capacitance, related to charge 8.11] Energy: Capacitor [8.11) acceleration due to gravity 9.8 on Earth; 1.6on Earth's Moon v2 P-VI-=PR R Q-CV E =; Cv? N G gravitational constant 6.67 x 10- k Boltzmann constant 1.38065 x 10 Inductance 8.11 Energy: Inductor [8.11] Hooke's Law for Spring [12.3] dl NA Avogadro number 6.022 x 10 V =La E =LF 2 F-k x ratio of circle circumference to diamcter 3.14159.. Newton's Law of Viscosity [12.3] Kinematic Viscosity [12.3 Elastic Materials Youngs Modulan (12 R ideal gas constant 0.08206 - 8314 PaL Δν 6 = EE melK mal K Ay 11분-1000분-624는 p density of water
Transcribed Image Text:Unit Conversion Table SI Prefixes and Dimensions Table Angle 1 rad e rad SI Prefixes Example: 1 milligram (mg]- 1 x 10 grams (gd Power I hp 57.3 deg deg 745.7 Example: 1 Megajoule (MJ] - 1x 10 joules (J) Numbers Greater Than One 180 3.412 BTU / h Numbers Less Than One 0.00134 hp cal / min Prefix Abbreviation Prefix Abbreviation Area 1 W Power of 10 Prefix Power of 10 Prefis 14.34 4,047 m t Ib /s -1 deci- 1 deca - da 0.7376 1 acre 0.00156 mi -2 centi- hecto- h 1 mi 640 acre Pressure 3 milli- 3. kilo- k m 1.01325 bar r Mega Energy 1 BTU 33.9 t H0 -6 micro 6. M 1,055.06 J 1 atm 29.92 in Hg -9 nano Giga- I cal 4.184 J 760 mm Hg -12 pico- 12 Tera- т 0.239 cal 101,325 Pa 9.48 10 ITU 0.7376 1J -15 femto- 15 Peta- 14.7 psi t Ib -18 atto- 18 Exa- E 1 kW h 3,600,000 J Time -21 21 Zetta zepto- 1d 24 h Force -24 yocto- 24 Yotta- 1h 60 min 0.225 Ib 1 min I yr IN 60 1x 10 dyne Fundamental Dimensions and Base SI Units 365 I kip 1,000 Ib Temperature Change electric current A ampere N amount |mol) mole Length J light intensity Jed) candela T time Is] second 1m 3.28 ft IK 1.8 1 km 1 in 0.621 mi 1.8 "R L length (m] meter O temperature [K) kelvin 254 cm 12 Volume M mass in (kgl kilogram 5,280 ft 3.785 L 1 mi 1 pal 1.609 km 4 qt cm or ce Common Derived, Named Units in the SI System Base SI Units 1 yd 3 ft 1,000 SI Unit Derived From 0.264 gal Dimensions Dimension Mass 0.0353 ML F-ma (F) newton IN Force (mass (acceleration 1N - 1 I kg 1 Ib 1 shug 1 ton (metric 1 ton (US 2.205 Ib Force A oz cm or ce 33.8 16 oz I ml. 32.2 Ib 1 m 1,000 L. ML? Energy (E) joule E-Fd PI Energy (force) (distance) 1J-1N m -1 2,204.62 Ib 16 d oz pt I gt 2,000 Ib 2 pt ML? (P) watt (W 1w - 1!-1 Power Named Units Power - jenergyi / (time) farad 1 (A s) / V 1 (V s) / A pascal poise 1 Pa IN/ m 1g/ (cm s) 1 em /s Pressure (P) pascal (Pal Pressure force) / (area) P-F/A 1 Pa - 1-1 M henry 1P LT2 1H hertz I Ha 1 St stoke IN m 1 V V IWIA V-P/I Voltage - (power) / (current) ML? joule 1J 1Nm volt Voltage (V) volt 1V -1"-1 T'I 1 (kg m) / s 1v/A newton 1N watt 1 W 1J/s ohm 10 Thinking Like an Engineer 4e An Aetive Learning Agpproach Thinking Like an Engineer 4e An Aetive Learning Approach an. P Cte 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 18.2 Rectangular Parallelepiped Volume - abe Surface Area 2 (ab+aeb e) Rectangle d- vt F - m a w = mg Areaab v -at Perimeter - 2 a+ 2b Density 8.3 Specific Gravity [8.3] Specific Weight [8.3] SG = Pobject Pwater w m V Cirele Sphere Y= Arear Volume -r Molecular Weight 8.4 Molarity Temperature: "F to "C 18.5) Circumference - 2*r Surface Area4sr T[*F] – 32 T["C] – 0 Diameter- 2r MW = V 180 100 Triangle Right Cireular Cone Temperature: "C to K [8.5 Temperature: "F to "R [8.5 Pressure 18.6) Area-bH Volume -rH T (K] = T["C] + 273 T ("R] - T ("F] + 460 F P = Torus Right Circular Cylinder 8.6 ideal Gas Law 18.7) Pascals Law ydrostatic Presure R6 Pressure: Total Volume -r H Volume - 2 R Phydre PgH Protal - Pydre + Purface PV-n RT 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? 3x 10 speed of light in a vacuum Energy: Thermal [8.8 Power 8.9 Power 8.9) speed of sound in air (20 "C) 343.59 E Q-m Cp AT P = Pout + Post Euler number (base of natural logarithm) 2.71828.. e elementary charge of an electron 1.602 x 10 "C 9.65 x 10 Efficiency [8.10 Current, elated t charge [8.11) Ohm's Law of Resistance [8.11] F Faraday's constant Pout Pin Q-It V-IR golden ratio 1.61803.. Joule's First Law of Power [8.11 Capacitance, related to charge 8.11] Energy: Capacitor [8.11) acceleration due to gravity 9.8 on Earth; 1.6on Earth's Moon v2 P-VI-=PR R Q-CV E =; Cv? N G gravitational constant 6.67 x 10- k Boltzmann constant 1.38065 x 10 Inductance 8.11 Energy: Inductor [8.11] Hooke's Law for Spring [12.3] dl NA Avogadro number 6.022 x 10 V =La E =LF 2 F-k x ratio of circle circumference to diamcter 3.14159.. Newton's Law of Viscosity [12.3] Kinematic Viscosity [12.3 Elastic Materials Youngs Modulan (12 R ideal gas constant 0.08206 - 8314 PaL Δν 6 = EE melK mal K Ay 11분-1000분-624는 p density of water
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