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2. Verify the conversion factors (a) 1 Btu/ft2-hr 3.1525 W/m2 (b) 1 Btu/hr -0.292 875 W...
A 100 ft2 wall consists of 4 in of red brick (k = 0.38 Btu-ft/hr-ft-°F), 1...
A 100 ft2 wall consists of 4 in of red brick (k = 0.38 Btu-ft/hr-ft-°F), 1 inch of pine (k = 0.06 Btu-ft/hr- ft-°F) and 42 inch of plaster board (k = 0.30 Btu-ft/hr-ft-°F). The internal and external film heat transfer coefficients are 1.65 Btu/hr-ft-°F and 6.00 Btu/hr-ft-'F respectively. The inside and outside air temperatures are 72 °F and 30 °F respectively. The heat transfer rate is:
A building has a design heating load of 63,000 BTU/hr. A series loop hydronic heating system...
A building has a design heating load of 63,000 BTU/hr. A series loop hydronic heating system will be used. A 2-in type M copper tubing will be selected for baseboard. Supply temperature (temperature of water leaving the boler) is 220° F and an overall system temperature drop of 300 F is permitted. Determine: a. Water temperature at exit of Unit #1(OF), b. Water temperature at the entrance of unit # 5 (OF) c. Flow rate in Unit # 5 (GPM),...
Select the conversion factors needed to convert 3.00 x 108 m/s to mi/hr. Choose one or...
Select the conversion factors needed to convert 3.00 x 108 m/s to mi/hr. Choose one or more: A. 60s= 1 min B. 60 min = 1 hr C. 1 cm= 1x 10-2m D. 24 hours = 1 day E 1m = 10-3 km F. 1 km = 0.6214 mi Part 2 (0.5 pt) X Feedback Perform the conversion in Part 1. 6.710 mi/hr
The shield of a nuclear reactor can be idealized as a slab with a face area...
The shield of a nuclear reactor can be idealized as a slab with a face area of 6 ft2 and a thermal conductivity k = 2 Btu / hr*ft*°F. Heat is generated in the shield at a steady rate S = S0 exp(-bx) [Btu / hr*ft3 ] where x = 0 denotes the inner surface close to the nuclear reactor and the outer surface is at x = L. The temperature is maintained at 300 °F at the inner surface...
given the information: answer clear and correct 1 Common conversions: 1 hr = 3600 s 1...
given the information:
answer clear and correct
1 Common conversions: 1 hr = 3600 s 1 N = 1 kg*m/s2 1 J = 1 N*m = 1 kg*m/s? 1 W = 1 J/s = 0.738 ft-lb/s 1 hr = 550 ft-lb/s = 746 W 1 kW*h = 3.60x106 J 1 eV = 1.602x10-19 J 1 C = 1 A's 1 V = 1 J/C 12 = 1 VIA 1 A = 1 C/s 1 T = 1 N/A m 1...
An electric heater whose total area is 2 ft? and whose volume is 1/12 ft3 is...
An electric heater whose total area is 2 ft? and whose volume is 1/12 ft3 is dissipating elec- trical energy at the rate of 5000 watts-17,000 Btu/hr in the steady state while suspended in a room where the air is at 80 F and the average surface coefficient of heat transfer is 30 Btu/hr ft °F. Suddenly, the heater falls (but remains plugged in) on to a rug on the floor which effectively insulates half the heater. For the heater,...
given the information answer: clearly and correct 1 Common conversions: 1 hr = 3600 s 1...
given the information
answer: clearly and correct
1 Common conversions: 1 hr = 3600 s 1 N = 1 kg*m/s2 1 J = 1 N*m = 1 kg*m-/s2 1 W = 1 J/s = 0.738 ft-lb/s 1 hr = 550 ft-lb/s = 746 W 1 kW*h = 3.60x106J 1 eV = 1.602x10-19 J 1 C = 1 A's 1 V = 1 J/C 12 = 1 VIA 1 A = 1 C/s 1 T = 1 N/A*m 1 Wb =...
I need questions 1-6 answered Constants and Conversion FactorsConstants and Conversion Factors Γ for 137Cs=0.33 R...
I need questions 1-6 answered
Constants and Conversion FactorsConstants and Conversion
Factors
Γ for 137Cs=0.33 R m2/Ci hrΓ for 137Cs=0.33 R m2/Ci hr
C=0.00873 J/kg RC=0.00873 J/kg R
Mass attenuation coefficient of water=0.0326 cm2/gMass
attenuation coefficient of water=0.0326 cm2/g
Mass attenuation coefficient of air=0.0293 cm2/gMass attenuation
coefficient of air=0.0293 cm2/g
Attenuation coefficient of lead=1.23 cm−1Attenuation coefficient
of lead=1.23 cm−1
For x-rays, 1Gy = 1Sv
1)What is the total exposure at a point 1 mm
from a 100 mCimCi source of...
In Experiment 1, unpolarized light of intensity 100 W/m2 is sent through a polarizer A and...
In Experiment 1, unpolarized light of intensity 100 W/m2 is sent
through a polarizer A and is then incident on a polarizer B with
axis perpendicular to that of Polarizer A. In Experiment 2, a third
polarizer C is placed between A and B such that the polarization
axis of C is 45 degrees from that of A and B. Which of the
following is true?
a. The intensity of light transmitted through B will be 0W/m2 in
Experiment 1...
1-4): You may find the following helpful for problems 1- R 8.314 N-m/( 1 J =...
1-4): You may find the following helpful for problems 1- R 8.314 N-m/( 1 J = 1 N-m. mole-K) or 1545 ft-lbf/(mole-R); 9e-32.17 lbm-ft/(lb-sec?); go 1 in SI units RF + or 28 lbm/mole; 1 bar 460 K + 273: 778 ft-lbr 1 Btu; MW of Nitrogen - 100,000 N/m2 1. (30 pts) A piston-cylinder arrangement forces 3 lbm of ideal gas N2 at 14.7 psia and T 80 °F to P2 36 psia in a quasi equlioiu where the...
A 100 ft2 wall consists of 4 in of red brick (k = 0.38 Btu-ft/hr-ft-°F), 1 inch of pine (k = 0.06 Btu-ft/hr- ft-°F) and 42 inch of plaster board (k = 0.30 Btu-ft/hr-ft-°F). The internal and external film heat transfer coefficients are 1.65 Btu/hr-ft-°F and 6.00 Btu/hr-ft-'F respectively. The inside and outside air temperatures are 72 °F and 30 °F respectively. The heat transfer rate is:
A building has a design heating load of 63,000 BTU/hr. A series loop hydronic heating system will be used. A 2-in type M copper tubing will be selected for baseboard. Supply temperature (temperature of water leaving the boler) is 220° F and an overall system temperature drop of 300 F is permitted. Determine: a. Water temperature at exit of Unit #1(OF), b. Water temperature at the entrance of unit # 5 (OF) c. Flow rate in Unit # 5 (GPM),...
Select the conversion factors needed to convert 3.00 x 108 m/s to mi/hr. Choose one or more: A. 60s= 1 min B. 60 min = 1 hr C. 1 cm= 1x 10-2m D. 24 hours = 1 day E 1m = 10-3 km F. 1 km = 0.6214 mi Part 2 (0.5 pt) X Feedback Perform the conversion in Part 1. 6.710 mi/hr
given the information:
answer clear and correct
1 Common conversions: 1 hr = 3600 s 1 N = 1 kg*m/s2 1 J = 1 N*m = 1 kg*m/s? 1 W = 1 J/s = 0.738 ft-lb/s 1 hr = 550 ft-lb/s = 746 W 1 kW*h = 3.60x106 J 1 eV = 1.602x10-19 J 1 C = 1 A's 1 V = 1 J/C 12 = 1 VIA 1 A = 1 C/s 1 T = 1 N/A m 1...
An electric heater whose total area is 2 ft? and whose volume is 1/12 ft3 is dissipating elec- trical energy at the rate of 5000 watts-17,000 Btu/hr in the steady state while suspended in a room where the air is at 80 F and the average surface coefficient of heat transfer is 30 Btu/hr ft °F. Suddenly, the heater falls (but remains plugged in) on to a rug on the floor which effectively insulates half the heater. For the heater,...
given the information
answer: clearly and correct
1 Common conversions: 1 hr = 3600 s 1 N = 1 kg*m/s2 1 J = 1 N*m = 1 kg*m-/s2 1 W = 1 J/s = 0.738 ft-lb/s 1 hr = 550 ft-lb/s = 746 W 1 kW*h = 3.60x106J 1 eV = 1.602x10-19 J 1 C = 1 A's 1 V = 1 J/C 12 = 1 VIA 1 A = 1 C/s 1 T = 1 N/A*m 1 Wb =...
I need questions 1-6 answered
Constants and Conversion FactorsConstants and Conversion
Factors
Γ for 137Cs=0.33 R m2/Ci hrΓ for 137Cs=0.33 R m2/Ci hr
C=0.00873 J/kg RC=0.00873 J/kg R
Mass attenuation coefficient of water=0.0326 cm2/gMass
attenuation coefficient of water=0.0326 cm2/g
Mass attenuation coefficient of air=0.0293 cm2/gMass attenuation
coefficient of air=0.0293 cm2/g
Attenuation coefficient of lead=1.23 cm−1Attenuation coefficient
of lead=1.23 cm−1
For x-rays, 1Gy = 1Sv
1)What is the total exposure at a point 1 mm
from a 100 mCimCi source of...
In Experiment 1, unpolarized light of intensity 100 W/m2 is sent
through a polarizer A and is then incident on a polarizer B with
axis perpendicular to that of Polarizer A. In Experiment 2, a third
polarizer C is placed between A and B such that the polarization
axis of C is 45 degrees from that of A and B. Which of the
following is true?
a. The intensity of light transmitted through B will be 0W/m2 in
Experiment 1...
1-4): You may find the following helpful for problems 1- R 8.314 N-m/( 1 J = 1 N-m. mole-K) or 1545 ft-lbf/(mole-R); 9e-32.17 lbm-ft/(lb-sec?); go 1 in SI units RF + or 28 lbm/mole; 1 bar 460 K + 273: 778 ft-lbr 1 Btu; MW of Nitrogen - 100,000 N/m2 1. (30 pts) A piston-cylinder arrangement forces 3 lbm of ideal gas N2 at 14.7 psia and T 80 °F to P2 36 psia in a quasi equlioiu where the...
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