# Thermodynamics Cengel 8th Edition Solutions

PDFMay 30, 2020

## ENERGY, ENERGY TRANSFER, AND

  0 Btu 25 , 037 ft /s.

( 50 )ft/s( 10 lbm)2. (60m).1( 25 kg/m)( 10 m/s)4. 1 kW( 120 kg/s)(1 kJ/kg). Wmax Emech emmech. .0 0245 kJ/kg1000 m /s. .0 050 kJ/kg1000 m /s. .1( 25 kg/m)(7 m/s)(1m )(0 kJ/kg) 0 kW. .1( 25 kg/m)(10 m/s)(1m )(0 kJ/kg) 0 kW. .0( 2144 kW)(3000 h/yr) (per m flow area). E 1 max, W t11 max,   643 kWh/yr. .0( 625 kW)(1500 h/yr) (per m flow area). E 2 max, W 2 max, t 2   938 kWh/yr. 1 Btu( 144 , 000 lbf ft). lbf 13( 2000 lbm)( 32.

1 Btu.0 001909 lbf ft .0( 001909 lbf ft).

2 ( ) .0(2 005 lbf/ft /3() 12 ft) /5( 12 ft). 1 kJ(12,500 kg)(9 m/s)(200 m)22. 1 m/s( 10 km/h) . .2 778 m/s 0- . 1 kJ/kg(12,500 kg) .2( 778 m/s) 02. 1 kJ/kg/ (12,500 kg)(9 m/s)(1 m)22.

in sh,in out 2 1. Change in internal, kinetic,. by heat, work,and mass. Netenergy transfer. 30 kJ kJ5 kJ5 10 kJ. Change in internal, kinetic,. by heat, work,and mass. Netenergy transfer. 65 Btu 5 Btu 8 Btu. potential, etc. Rateof changein internal, kinetic,. 0 (steady)system. by heat, work, mass and.

Rateofnet energy transfer. in out      . 1 Btu8( ft /s)( 70 15 )psia. (Power consumed per lamp) (No. of lamps)=(400 6 110 W)=264,000 264 kW. (Power consumed per lamp) (No. of lamps)=(200 12 110 W)=264,000 264 kW.

lighting, total lighting, classroom lighting, offices.

lighting, offices. lighting, classroom.   \$55,757/yr. Cost savings (Energy savings)(Unit cost of energy) (506,880 kWh/yr)(\$0/kWh). Energy savings (Elighting, total)(Unoccupied hours) (528 kW)(960 h/yr) 506,880 kWh.

Annual cost savings. Implementation cost. potential, etc. Rateof change in internal, kinetic,. by heat, work,and mass. Rateof netenergy transfer. in lights TV refrig iron. potential, etc. Rateof change in internal, kinetic,. 0 (steady)system. by heat, work,and mass. Rateof netenergy transfer. outelect,in air out air. .0( 075 lbm/ft)(3 3 ft )(22 ft/s) 14.   .0 1435 Btu/s 25,037 ft /s.

( 22 ft/s)1(4 lbm/s)2 22. potential, etc. Rateof changein internal, kinetic,. by heat, work, mass and. Rateofnet energy transfer. in out   . 1 kJ/kg(3750 kg)(9 m/s )(0 m/s)sin22. 1 kJ/kg(3750 kg)(9 m/s)(1 m/s)sin22. potential, etc. Rateof changein internal, kinetic,. by heat, work, mass and. Rateofnet energy transfer. in out   . (110/3 m/s) -(70/3 m/s)(1400 kg)2 22. (110/3 m/s) -(70/3 m/s)(700 kg)2 t. mech,out mech,inpump-motor pumpmotorW.

Mechanical energy extracted from the fluid | |. Mechanical energy output. elect,outgeneratorMechanical power input. Electrical power output. mech,in mech,out. elect,outturbinegen- turbinegeneratorE. PROPRIETARY MATERIAL. © 2015 McGraw-Hill Education. Limited distribution permitted only to teachers and educators for course preparation.If you are a student using this Manual, you are using it without permission. PROPRIETARY MATERIAL. © 2015 McGraw-Hill Education. Limited distribution permitted only to teachers and educators for course preparation.If you are a student using this Manual, you are using it without permission.

1-9 The mass of an object is given. Its weight is to be determined.Analysis Applying Newton's second law, the weight is determined to be. W  mg ( 200 kg)( 6 m/s 2 ) 1920 N. 1- 10 A plastic tank is filled with water.