Engineering

4kj of energy are supplied to a machine used for lifting a mass.The force required is 800N.If the machine has an efficiency of 50%. To what height will it lift the mass?
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Complete the following sentence. (blank) is the study of the design, form, and function of objects in the real world.
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The calculated value of the thermal conductivity of the carbon nano tube was found as: KCN = 3113 W/m-K, however, the theoretical value of the thermal conductivity of the wire is actually: K = 4500 W/m-K and the island separation is 5 m (this is the actual spacing between the two islands). The difference between the measured and theoretical values is due to the contact resistance between the nano tube and the islands in the experiment. Required:a. Calculate the thermal contact resistance (Rtd) that exists between the carbon nano tube and the top surfaces of the heated and sensing islands. b. Using the value of thermal contact resistance calculated in part A, calculate the fraction of the total resistance between the heated and sensing islands that is due to the thermal contact resistances for island separation distance of 5, 10, 15, and 20 m.
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?Why the efficiency of Class A amplifier is very poor
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A pressure transducer has the following specifications: Input rage: 0-100 psi and the corresponding Output Range: 0-5 Volts. Linearity Error: 0.10% of the Reading Hysteresis Error: 0.10% of the Reading Sensitivity Error: 0.15% of the Reading Zero Drift Error: 0.20% of the Reading Its output is read via a voltmeter with instrument error of 0.10% of the reading and resolution of 0.01 V. If the applied pressure on the transducer is 65 psi, what is the design stage uncertainty of this pressure measurement system?
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A laminated steel ring is wound with 3000 turns. When the magnetism current varies between 7 and 9 A, the magnetic flux varies between 860 and 900Nwb, calculate the incremental inductance of the coil over this range of current variation
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1. What is the maximum value of the linear density in a crystalline solid (linear density defined as the fraction of the line length occupied by atoms, assumed as spheres and only counted it their center is on the line)?2. What family of directions has the highest linear density in the FCC system? 3. What family of directions has the highest linear density in the BCC system? 4. What family of planes has the highest planar density in the FCC system? 5. What family of planes has the highest planar density in the BCC system? 6. What family of planes has the highest planar density in the HCP sytem?
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The AGC control voltage: ___________a. varies as the signal strength of the received signal varies. b. a negative feedback voltage. c. is actually the dc voltage component produced by the mixing action in the AM demodulator stage. d. is produced by an RC circuit having a much larger time constant than that of the detector. e. all of the above
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Here are the city gas mileages for 13 different midsized cars in 2008. 16, 15, 22, 21, 24, 19, 20, 20, 21, 27 , 18 , 21 , 48 What is the minimum ?
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Uber drivers are considered 'independent contractors' and thus can apply for business licenses.Uber drivers can be deactivated if their rating becomes too low.True or false
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Identify the best drying agent or process for each described purpose. Removal of small amounts of water from a polar solvent____. Removal of visible pockets of water from an organic solvent____. Storage of solvents or other materials in a desiccator_____.
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Help me with this thanks
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Request for proposal (RFP) is a type of document that contains the information and proposals mostly through the bidding process. This document is regarding the valuable assets, services, entity, commodity, etc.
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Which of the following conditions would completely shut down a circuit
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Problem In the clevis shown in Fig. find the minimum bolt diameter and the minimum thickness of each yoke that will support a load P= 14 kips without exceeding a shearing stress of 12 ksi and a bearing stress of 20 ksi
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quy trnh sn xut bao b plastic dng ti
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Mt my nghin bi thng ngn ng knh D = 1.6m, di L = 2m dng nghin VL. Kch thc u vo D1 = 20mm, sn phm sau nghin c kt qu phn tch ry sau:S mesh60/8080/100100/150150/200Khi lng VL trn ry0.10.32.50.1Hi1. Tnh kch thc bi nghin bi.2. Tnh s vng quay ti u.3. Tnh nng sut (bit K1 = 1.01).4. Tnh s lng bi cn np vo thng. Bit h s cha y = 0.25, h s rng = 0.65, bi = 8000 kg/m3
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how Many years of college do you have To do in order To become a video game developer and designer
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Why is the newtons law of cooling and explain how to derive it/
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A confined aquifer with a transmissivity of 300 m2/day and a storativity of 0.0005 and a well radius of 0.3 m. Find the drawdown in the well at 100 days if the following pumping schedule is followed after a long period of time of no pumping. Period 1 2 3 4Time (days) 0-20 20-50 50-90 90-100 Q (m3/day) 500 300 800 0
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It is essential to wait until the end of the project to check if the sponsor/customer requirements and expectations have been met regarding the quality of the project deliverables. T/F
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A heat pump heats the air in a rigid, insulated cuboid room of size 25m x 10m x 4m. The heat pump consumes 15 kW of power. The initial temperature and pressure in this room are 12C and 1 bar, respectively. With an average coefficient of performance of COPHP= 3.0 over the range of air temperature in this room. Requried:How long will it take to raise the temperature in the room to 27 C?
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An electron is traveling with initial kinetic energy K in a uniform electric field. The electron comes to rest momentarily after traveling a distance d.a. What is the magnitude of the electric field? b. What is the direction of the electric field?1. in the direction of the electron's motion2. opposite to the direction of the electron's motion 3. perpendicular to the direction of the electron's motion
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Please label the following statements as either True (T) or False (F). (a) The true stress is higher than the engineering stress for a sample under tension. (b) Creep test is carried out with a dynamic stress under elevated temperature.
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