Physics, 02.08.2019 17:10 kperez1186
Ammonia enters the compressor of an industrial refrigeration plant at 2 bar, −10°c with a mass flow rate of 15 kg/min and is compressed to 12 bar, 140°c. heat transfer occurs from the compressor to its surroundings at a rate of 6 kw. for steady-state operation with negligible kinetic and potential energy effects, determine (a) the power input to the compressor, in kw, and (b) the rate of entropy production, in kw/k, for a control volume enclosing the compressor and its immediate surroundings such that the heat transfer occurs at 300 k.
Answers: 2
Physics, 22.06.2019 02:30
Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.
Answers: 2
Physics, 22.06.2019 16:30
Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?
Answers: 2
Physics, 22.06.2019 18:30
In which situation is the acceleration of a car negative? question 5 options: a)the velocity of a car was 75 km/hr over 4 hours. b)the velocity of a car reduced from 50 km/hr over one minute. c)the velocity of a car increased from 40 km.h to 75 km/h over 15 minutes. d)the velocity of a car was 45 km/hr at 2: 00pm and at 4: 00pm its velocity was 85 km/ht.
Answers: 2
Physics, 22.06.2019 19:00
The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.
Answers: 1
Ammonia enters the compressor of an industrial refrigeration plant at 2 bar, −10°c with a mass flow...
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