A 12hp motor is used to drive an air compressor. The compressor efficiency is 70%. Find the mass of air in kg needed per minute if air is available at 30C. The pressure compresses to 8 times its original pressure. Ans: 1.52

Q: A compressor draws 500 cfm of air whose density is 0.079 lb/ft^3 and discharges some it with a…

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Q: A hydraulic cylinder of area 0.05 m2 must push a 2000 kg arm and shovel 0.8 m straight up. What…

A: Data given-  A = 0.05 m2  m = 2000 kg  ∆x = 0.8 m

Q: On a cold winter day, the rate of heat transfer from the air in a certain room is 5500 Btu/hr. The…

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Q: A compressor takes in refrigerant R-134a at a pressure of 23.8 psia andcompresses it to 122.8 psia.…

A: Given Data⇒ Refrigerant R-134 a Suction pressure Psuction=23.8 PSia Discharge pressure…

Q: How high is this platform

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Q: A centrifugal pump compresses 3 000 L/min of water from 98 kPaa to 320 kPaa. The inlet and outlet…

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Q: The pressure inside a diesel engine cylinder is 20 kPa, find the work done if the volume changes…

A: Given data: P=20 kPaV1=3.5 m3V2=5 m3 Need to determine the work done.

Q: The properties at the inlet and the exit states of the air compressor are shown in the figure. The…

A: P

Q: An air compressor takes in air at 128 kPa at the rate of 0.87 m^3/sec, and discharge 685 kPa.…

A: Calculated power of compressor in kW.

Q: A grist mill of the 1800s employed a waterwheel that was 14 m high; 480 L/min of water flowed onto…

A: Given: The height of the water wheel is H=14 m. The volume flow rate of the water on the wheel is…

Q: 3.) An air compressor handles 8.5 m³/min of with a density of 1.26 kg/m² and a pressure of 1 atm,…

A: Given data  Volume flow rate = 8.5 m3/min density (ρ)= 1.26 kg/m3  Pressure (P)= 1 atm  discharge…

Q: Energy is added to 5 kg of air with a paddle wheel until T = 100 C. Find the paddle wheel work if…

A: Given the system is insulated.

Q: 1.0 An air compressor takes in air at 105 Pa and 27Chaving volume of 1.5 m3/kg and compresses it to…

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Q: mple 4.1 A stationary mass of gas is compressed without friction from an ini- tial state of 0.3 m…

A: First law of thermodynamics states that in a closed cycle, the sum of heat is equal to sum of work.…

Q: isobaric process A certain gas, with cp = 0.529 Btu/lb -R and R = 96 ft lb/lb -R, expands from 5…

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Q: 2) a 1550-kg car moving at a constant speed of (900 km/hr) Its takes (16,000W)to keep it on alevel…

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Q: 1. 1.43 1b oF gas is stored in a tank of 24t. If the internal energy decre ases by 27.4 BTU as…

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Q: Ch A system takes in 0.610 kJ of heat while it does 0.930 kJ of work on the surroundings. What is…

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Q: The ventilation in a house changes the air every five hours. How much power does it take to warm the…

A: Given : A = 150 m2 T0 = 0 C To find : Power required

Q: 1. Heat added to a 0.51m3 of air at constant pressure which results to a temperature increase of…

A: Given Data⇒ Volume (V)=0.51 m3 Constant pressure heat addition Temperature increase…

Q: A bag of wheat weighs 200 kg. To what height should it be raised so that potential energy is 9800 J?…

A: Given data :                  Mass of the  bag  = m                   Potential energy  =  P•E…

Q: Find the flow work done by carbon dioxide if its change in internal energy is 260 kJ/kg.

A: Given:- ΔV= 260 kj/kg kCO2=1.29 To find:- Flow work done

Q: Find the work done when a 25 kg weight is (i) lifted to a vertical height of 2.0 m from the ground,

A: Given data : The value of mass=25 kg The value of acceleration due to gravity=9.81 m/s2 The value of…

Q: Q4) A) What is the diflference between R and Ru and how these two are related. B) What is the…

A: We are suppose to solve only one question. Please post other question as a separate question.

Q: A 100-hp (1 hp = 746 W) car engine has a drive shaft rotating at 2000 RPM. How much torque is on the…

A: Given Data  1hp=746 W N=2000 rpm Power of the engine, P=100 hp Power=746(100)=74600 watt…

Q: 5. Air is compressed polytropically in a cylinder according to pV² = C. The wor required is 180 kJ.…

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Q: A 75 kg diver climbs up a 6.5 m high diving board in 50 s, how much work is done by the diver and…

A: M=75kg x = 6.5 m t = 50s g=9.80m/s2 To find 1.Work Done 2.Power

Q: A 5 kg gaseous system in a piston cylinder receives heat at a constant pressure of 350 kPa. The…

A: Given Data m= 5 kg P=350 kPa= constant ∆U= 200 kJ ∆T= 70 K W= 100 kJ

Q: From a state defined by 300 psia, 100 cu.ft and 240F, helium undergoes an isentropic process to…

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Q: A reciprocating compressor draws in 500 cubic feet per minute of air whose density is 0.079 Ib/ft^3…

A: Air sucking with density =0.079 lb/ft3Discharge density =0.304 lb/ft3P1=15 PsiaP2=80 psia Increase…

Q: Water at 2.5 MPa and 200° C is heated at constant temperature up to a quality of 80%. Find (a) the…

A: Answer: (a) The quantity of heat received by the water is 1551.792 kJ/kg. (b) The change in internal…

Q: Find the change in internal energy in BTU of a 5-lb mass of oxygen when the temperature changes from…

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Q: In a tank with a volume of 5 m2, there is 4 kg of wet steam with 0.05 of quality. This steam is…

A: given data  volume (v)  = 5 m3 mass (m) = 4 kg wet steam with (x) = 0.05

Q: The components of energy for flowing fluid flow through an inlet are mV² (KE), mgz (PE), and what?

A: The components of energy for flowing fluid flow through an inlet are mV2 (KE), mgz (PE), and what?

Q: One pound of air per second with an initial temperature of 180°F is allowed to expand ow (closed…

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Q: One pound of air per second with an initial temperature of 180°F is allowed to expand without flow…

A: Given that, Initial temperature, Ti=180 °F,Initial Pressure, Pi=120 psia,Final pessure, Pf=20…

Q: A gas is compressed from an initial volume of 0.38 m3 to a final volume of 0.1m3. The variation of…

A: GIVEN:initial volume VI=0.38m3final volume V2=0.1m3p=aV+ba=-1200kpa/m3b=600kpa/m3

Q: 1. One pound of air per second with an initial temperature of 180°F is allowed to expand without…

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Q: What is the energy requirement in kW for a pump that is 75% efficient if it increases the pressure…

A: Given data    pump efficiency = 75 %  flow rate m.= 10 kg/s             Pwater=kgm3 Initial…

Q: A container maintains a constant pressure of 86300 Pa and volume of 116 liters while 49960 J of heat…

A: Given Constant pressure = 86300 Pa Constant volume = 116 liters Heat added = 49960 J To find Work…

Q: A rigid tank consisting of two equal parts has a pressure of 300 kPa and 6 kg of water at 30oC on…

A: Given:water Pressure, P=300 kPawater temperature, T=30o Cmass of the water, m=6 kg

Q: Water flowing at the rate of 10 m/s from an orifice at bottom of a reservoir. Find the pressure at…

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Q: An air compressor handles 8.5 m3/min of air with a density of 1.26 kg/m³ and a pressure of 1 atm and…

A:

Q: A bag of wheat weight 300 kg .To what height should it be raised so that potential energy is 9600 J?…

A: Given data :           Mass of the bag  =  m           Potential energy  =  P•E…

Q: 9. A reservoir contains 2.83 cu m ôf carDon 6895 kPa and 23.6°C. An evacuated tank is filled from…

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Q: Air has an initial pressure of 17 psia and temperature of 67 °F undergoes a polytropic process such…

A: Pi=17 psiaT1=67°FPf=95 psiaTf=247° Fa Calculate polytropic index nSince process is polytropic so…