Engineering, 23.09.2020 14:01 stussy44
3. Seals employ a 2 cm thick layer of fat (k = 0.18 W/m·K) to reduce heat loss to their environment. What is the thickness of a diver’s suit made of urethane (k = 0.023 W/m·K) to achieve the same level of insulation as the layer of fat in the seal? If the deep body temperature of a seal is 36.5°C and it has a surface area of 0.8 m2, calculate the conduction heat loss of this seal in 5°C water.
Answers: 2
Engineering, 04.07.2019 18:10
The higher the astm grain size number, the finer the gran is. a)-true b)-false
Answers: 2
Engineering, 04.07.2019 18:20
Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.
Answers: 2
Engineering, 04.07.2019 19:10
Afoot bridge is made as a simple deck, 4 m long, with a cross section 2 m (wide) and 20 cm thick, and made of wood. the deck is supported at the two ends. the maximum load allowable on the bridge is 10 tons, provided it is uniformly distributed on the deck. to sense this load, a strain gauge is placed at the center of the bridge and its resistance is monitored. if the sensor has a nominal resistance of 350 s2 and a gauge factor of 3.6, what is the reading of the strain gauge at maximum load? the modulus of elasticity for the wood used in the construction is 10 gpa.
Answers: 2
Engineering, 06.07.2019 02:30
Precipitation hardening can be achieved in many light alloys by a three-step heat treatment. what is carried out and what is the purpose at each step? why is such a treatment necessary based on the nucleation and growth theory of phase transformation. compare this treatment with tempering martensite for carbon steels (similarities and differences).
Answers: 1
3. Seals employ a 2 cm thick layer of fat (k = 0.18 W/m·K) to reduce heat loss to their environment....
Chemistry, 13.11.2020 18:50
Physics, 13.11.2020 18:50
History, 13.11.2020 18:50
English, 13.11.2020 18:50
Computers and Technology, 13.11.2020 18:50
Mathematics, 13.11.2020 18:50
Mathematics, 13.11.2020 18:50
Mathematics, 13.11.2020 18:50
Mathematics, 13.11.2020 18:50
Mathematics, 13.11.2020 18:50
Social Studies, 13.11.2020 18:50