Engineering, 07.10.2020 08:01 chrjergre6520
Which of the following describes what occurs when energy is lost in efficient transformation?
it is destroyed
it increases fluid power
it creates new energy
it takes the form of heat or thermal power
Answers: 1
Engineering, 04.07.2019 18:10
Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.
Answers: 3
Engineering, 04.07.2019 18:10
Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk
Answers: 1
Engineering, 04.07.2019 18:10
Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way
Answers: 2
Engineering, 04.07.2019 18:10
An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature
Answers: 2
Which of the following describes what occurs when energy is lost in efficient transformation?
it is...
English, 14.07.2021 16:40
Physics, 14.07.2021 16:40
Mathematics, 14.07.2021 16:40
Mathematics, 14.07.2021 16:40
History, 14.07.2021 16:40
Mathematics, 14.07.2021 16:40
History, 14.07.2021 16:40
Mathematics, 14.07.2021 16:40
Mathematics, 14.07.2021 16:50
English, 14.07.2021 16:50
Mathematics, 14.07.2021 16:50
Mathematics, 14.07.2021 16:50
Mathematics, 14.07.2021 16:50
Mathematics, 14.07.2021 16:50
Mathematics, 14.07.2021 16:50