Engineering

Consider an ideal gas undergoing a constant pressure process from state 1 to state 2 in a closed system. The specific heat capacities for this material depend on temperature in the following way, cv = aT^b , cp = cT^d , where the constants a, b, c and d are known. Calculate the specific entropy change, (s2 s1), from state 1 to state 2.
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After clamping a buret to a ring stand, you notice that the set-up is tippy and unstable. What should you do to stabilize the set-up
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When replacing a timing belt, many experts and vehicle manufacturers recommend that all of the following should be replaced except theA. water pumpB. camshaft oil seal(s).C. camshalt sprocketD. tensioner assembly
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You are driving a vehicle that has an automatic transmission. When you park on a hill, youshouldA: Set the parking brake first, before you shift the transmission into Park.B: Shift the transmission into Park, and leave the parking brake off.C: Set the parking brake, and shift the transmission into Neutral.
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Two small balls A and B with masses 2m and m respectively are released from rest at a height h above the ground. Neglecting air resistance, which of the following statements are true when the two balls hit the ground? (a) The kinetic energy of A is the same as the kinetic energy of B (b) The kinetic energy of A is half the kinetic energy of B. (c) The kinetic energy of A is twice the kinetic energy of B. (d) The kinetic energy of A is four times the kinetic energy of B Explain your answer why. What is the definition of General Plan Motion? What would be the effective methodology or approach to solve a rigid body kinematics problem?
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2. What is the charge, expressed in micro coulombs on two equally and similarly charges spheres placed in air with their centres 30 cm apart repelling each other with a force of 120 mgm.
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A bona fide established commercial marketing agency is a business which is specifically devoted to public relations, advertising and promoting the services of a client. True or False
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Consider atmospheric air at 25 C and a velocity of 25 m/s flowing over both surfaces of a 1-m-long flat plate that is maintained at 125 C. Determine the rate of heat transfer per unit width from the plate for values of the critical Reynolds number corresponding to 105 , 5 105 , and 106 .
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1. Two types of superchargers includeA. turbine and piston.B. roots-type and centrifugal.C. double- and single-actingD. rotary and reciprocating.
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When choosing building-construction materials, what kinds of materials would you choose, all other things being equal?
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An ideal turbojet engine is analyzed using the cold air standard method. Given specific operating conditions determine the temperature, pressure, and enthalpy at each state, and the exit velocity. --Given Values--T1 (K) = 249P1 (kPa) = 61V1 (m/s) = 209rp = 10.7rc = 1.8Required:a. Determine the temperature (K) at state 2.b. Determine the pressure (kPa) at state 2.c. Determine the specific enthalpy (kJ/kg) at state 2.d. Determine the temperature (K) at state 3.
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Q1: You have to select an idea developing an application like web/mobile or industrial, it should be based on innovative idea, not just a simple CRUD application. After selecting the idea do the following: 1) How your project will be helpful and what problem this project addresses. (10-Marks) 2) Write down the requirements. (10Marks) 3) List the functional and non-functional requirements of your project. (10marks) 4) Which process model you will follow for this project and why? (10marks) 5) Draw the Level 0, and level 1 DFD of your application. (20marks)
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The structure of a house is such that it loses heat at a rate of 5400 kJ/h per degree Cdifference between the indoors and outdoors. A heat pump that requires a power input of 6 kW isused to maintain this house at 21 C. Determine the lowest outdoor temperature for which the heatpump can meet the heating requirements of this house
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A four-cylinder four-stroke engine is modelled using the air standard Otto cycle (two engine revolutions per cycle). Given the conditions at state 1, total volume (V1) of each cylinder, compression ratio (r), rate of heat addition (Q), and engine speed in RPM, determine the efficiency and other values listed below. The gas constant for air is R =0.287 kJ/kg-K.T1 = 300 KP1 = 100 kPaV1 = 500 cm^3r = 10Q = 60 kWSpeed = 5600 RPMRequired:a. Determine the total mass (kg) of air in the engine.b. Determine the specific internal energy (kJ/kg) at state 1.c. Determine the specific volume (m^3/kg) at state 1.d. Determine the relative specific volume at state 1.
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If sail boats A and B are approaching each other with the wind on different sides, why is vessel A considered the give-way vessel (vessel that must take early and substantial action to avoid a collision)?
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According to the building-up principle or aufbau principle, which subshell is typically filled next after the 3d subshell? A) 4p B) 5f C) 6p D) 5d E) 3p
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After a capacitor is fully chargerd, a small amount of current will flow though it. what is this current called?
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Atmospheric air at 1 atm has a dry-bulb temperature of 20C and a wet-bulb temperature of 15C. Determine the dew point temperature
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Match the following light concepts - Light is bounced back at same angle - Light penetrates medium at different angle due to different material densities - Light bounces at different angles in periodic grid - Light enters medium at different angles through a grid - Light EMF field looses one axis componentA Polarized filter B. Transmission Diffraction C. Classical Reflection D. Refraction E. Reflected Diffraction
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You have accumulated several parking tickets while at school, but you are graduating later in the year and plan to return to your home in another jurisdiction. A friend tells you that the authorities in your home jurisdiction will never find out about the tickets when you re-register your car and apply for a new license. What should you do?
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Which of the following sentences ispunctuated incorrectly?
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Which type of engineering design uses an already existing design?A. top-down designB. spiral designC. bottom-up designD.incremental design
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The fins attached to a heat exchanger-surface are determined to have an effectiveness of 0.9. Do you think the rate of heat transfer from the surface has increased or decreased as a result of the addition of these fins?
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What is kinetic energy?
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