2 m 5 m/s B k₁ = 200 N/m wwwwwwww A
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The 8-kg block is moving with an initial speed of 5 m/s. If the coefficient of
kinetic friction between the block and plane is uk = 0.25, determine the maximum compression
in the spring when the block momentarily stops.
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- 1.) A hand pump is used to inflate a bicycle tire to a gauge pressure of 70 psi. a) How much work must be done if each stroke of the pump is an adiabatic process and what is the final temperature of the gas? b) We inflate the tire in two steps: (i) an isobaric compression and (ii) an isochoric increase in temperature. Calculate the work done by gas/"us" and/or heat added/removed during the two steps! Is this a viable alternative to the adiabtic compression Explain! Atmospheric pressure is 1 atm, the air temperature is initially 25° C, and the volume of the air in the tire remains constant. Useful values: A bicycle tire is 26 in diameter and has a cross-sectional area of 2 in² [1 in = 2.54 cm]. 1 lb corresponds to a mass of 0.445 kg. c) For Take-Home only Solve the questions in a) and b) in terms of the initial pressure P₁ = P*, the final volume Vf = V* and the pressure ratio K = Pf/P*!2) The energy consumed by a shower for 30 days is 22kwh. It is known that the resistance of the showerhead is 20 ohms and that its nominal current is 15A. So, what is the time in minutes that the shower was turned on during this period?Siven Quation 2 According to figure 1, Given data as (COP)HP =3.5, QH= 90000 KJ/h (rate) and 1KW = KJ/S (rate) a) Calculate W net in KJ/h ? b) Calculate Wnet in kilo watt (Kw) %3D Quation 3 Given data as Wnet = 98000.0 KJ/h (rate) and QH= 75000.0KJ/h(rate) a) Calculate Q in KJ/h ? b) Calculate QL in Kilo watt(KW) Quation 4 Given data QL=400.0 KJ/min (rate) and Wnet =3KW(rate) Calculat (COP)R?
- Q 1: For a particular gas system, the internal energy is given by : U = 2.5 PV + C , where P: Presure , V: volume and C : constant, the sysytem is taken into cycle shown in fig.(Q1) below with three Processes, Calculate Q & W if the pressure is given by P= 105+ 10° (v-0.02)² ? 05- 0.4 0.3E A 02E 0.1 0.01 002 003 V (m³) -> Fig. (Q1) P (MPa)What would be the resultant force F of the triangular distributed load and its location d measured from point A.A steam turbine is operated under the conditions shown in the figure.Define:a. steam flow rate (kg/min) to produce 1000 kW powerb. actual steam rate (kg/kWh)!c. turbine efficiencyd. What type of steam turbine belongs to this?
- DEFINE THE SYSTEMS AND CONTROL VOLUMES?Steam leaves an industrial boiler at 645.3kPa and 151.2°C. A portion of the steam is fed through a throttling calorimeter and released to the atmosphere when the calorimeter pressure exceeds 104.3kPa. If the calorimeter's steam temperature is 113.8°C, a. What is the amount of moisture that is escaping from the boiler container? Show unit analysis & conversion. b. Calculate the mass of the saturated vapor if the mass of the saturated liquid is 15kg. Show unit analysis & conversion. @645.3kPa and 151.2°C: hf = 624.56kJ/kg hfg =2123.3kJ/kg @104.3kPa and 113.8°C: h2=2506.7kJ/kgQ 1: For a particular gas system, the internal energy is given by : U = 2.5 PV + C , where P: Presure , V: volume and C: constant, the sysytem is taken into cycle shown in fig.(Q1) below with three Processes, Calculate Q & W if the pressure is given by P= 105 + 10° (v-0.02)² ? 05 04 V (m') Fig. (Q1) 02: Arigid tank of (0.3 m) at 15.5 bar , if 90% of mass is liquid water, how much heat must be added before the tank becomes just full of the liquid? 03/ An ideal gas is changed from pl = 1bar, vl= 10m³ to p2 =10 bar , v2 = 1m², calculate Q & W for the follwing process: a- Isothermal process. b- adiabatic compression followed by cooling process at constant pressure. c- Heating at constant volume followed by cooling at constant pressure? Take Cp= (5/2)R & Cv=(3/2) R Q4: A tank having a volume of 0.85 m³ initially contains water as a two-phase liquid- vapor mixture at 260°C and a quality of 0.7. Saturated water vapor at 260°C is slowly withdrawn through a pressure-regulating valve at the top…
- 3MPA 500 2 3-5 MPa Heater 400 c Wout = 6-5 MW (fram Tumrbrie It II) insulated Türbine insulated Turbine Steam 9 MPa 550 °C X = 96 % Find: 0 m of steam (in kg/s) 2 to the heater (in kw).1. The mean effective pressure of an engine running at 300 rpm is 500 kPa. What is the indicatedpower if the engine has bore of 250 mm x 450 mm. Select the correct answer below: A. 110.5 kW B. 150 kW C. 200 kW D. 182. 2 kW 2. In a certain process, entering is 1500 KJ/kg and 150 m/s. If the energy leaving is 12000 Kj/kg/ Determine the velocity at exit. Select the correct answer below: A.) 145 m/s B. 1020 m/s C. 789 m/s D. 978 m/sAn otto engine has a clearance volume of 7%. It produces 300 kilowatts ofpower. What is the amount of heat rejected in kW?