Engineering, 06.11.2020 22:00 brandonleekenyon
Which of the following best describes what drought is and why it is such a major challenge?
a.
Drought creates a moistness in the soil, which can cause crops to rot. Farmers can lose their entire crop
b.
Drought is a method of agriculture, in which the farmer sets fire to land to add nutrients to the soil. The fires can be a problem if they get out of control.
c.
Drought is caused by a lack of rain. It causes the destruction of crops which can often lead to widespread famine.
d.
Drought is caused by excessive amounts of rain. It causes the destruction of crops which can often lead to widespread famine.
Please select the best answer from the choices provided
A
B
C
D
Answers: 3
Engineering, 03.07.2019 15:10, theamandawhite
Ahouse has the following electrical appliance usage (1) single 40w lamp used for 4 hours per day (2) single 60w fan used for 12 hours per day (3) single 200w refrigerator that runs 24 hours per day with compressor run 12 hours and off 12 hours find the solar power inverter size in watt with correction factor of 1.25.
Answers: 1
Engineering, 04.07.2019 18:10, tjeffers90028
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.
Answers: 1
Engineering, 04.07.2019 18:10, abdirahmansoloman
Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?
Answers: 1
Which of the following best describes what drought is and why it is such a major challenge?
a.
Mathematics, 29.05.2020 21:02
Mathematics, 29.05.2020 21:02