Engineering

What happens to the current supplied by the battery when you add an identical bulb in parallel to the original bulb?
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Define the following terms in your own words: (a) elastic strain, (b) plastic strain, (c) creep strain, (d) tensile viscosity, (e) recovery, and (f) relaxation.
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A constant torque of 5 Nm is applied to an unloaded motor at rest at time t 0. The motor reaches a speed of 1800 rpm in 3 s. Assuming the damping to be negligible, calculate the motor inertia.
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What properties should the head of a carpenters hammer possess? How would you manufacture a hammer head?
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A firm has 62 employees. During the year, there are seven first-aid cases, three medicaltreatment injuries, an accident in which an injured employee was required to work 1 week in restricted work activity, a work-related illness in which the employee lost 1 week of work, a work-related illness in which the employee lost 6 weeks of work, and a fatality resulting from an electrocution. Calculate the total incidence rate, the number-of-lostworkdays rate, and the LWDI.
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When a thin glass tube is put into water, the water rises 1.4 cm. When the same tube is put into hexane, the hexane rises only 0.4 cm. Complete the sentences to best explain the difference.
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Determine the following for a south facing surface at 30 slope inGainesville, FL (Latitude = 29.68N, Longitude = 82.27W) on September 21 atnoon solar time (Assuming a ground reflectivity of 0.2):A. Zenith AngleB. Angle of IncidenceC. Beam RadiationD. Diffuse RadiationE. Reflected RadiationF. Total RadiationG. Local Time (note Gainesville has daylight savings on Sep 21)
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a. For a 200g load acting vertically downwards at point B, determine the axial load in members AB, BC, BD, CD and CE. b. Repeat this for the load hung at C, D and F
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The electric potential difference between the ground and a cloud in a particular thunderstorm is 3.0 109 V. What is the magnitude of the change in the electric potential energy of an electron that moves between the ground and the cloud?
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Which specific gravity is generally used for calculation of the volume occupied by the aggregate in Portland cement concrete, and why?
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David wants to determine what his organization should do in the future, and set project targets. Which management function can David use to do this
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why do you think slaves traders and slave owners wanted to keep slaves uneducated?
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In a wind-turbine, the generator in the nacelle is rated at 690 V and 2.3 MW. It operates at a power factor of 0.85 (lagging) at its rated conditions. Calculate the per-phase current that has to be carried by the cables to the power electronics converter and the step-up transformer located at the base of the tower.
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The waffle slab is: a) the two-way concrete joist framing system. b) a one-way floor and roof framing system. c) the one-way concrete joist framing system. d) an unreinforced floor and roof framing system
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A composite plane wall consists of a Li = 125 mm thick layer of insulation (ki = 0.05 W/m.K) and a Ls = 25 mm thick layer of siding (ks = 0.10 W/m.K). The inner temperature of the insulation is 20 C. The outer temperature of the siding is -10 C. Steady state conditions apply.Determine the temperature at the interface between the two layers, in C, and the rate of heat transfer through the wall, in W per m2 of surface area.
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An op-amp is connected in an inverting configuration with R1 = 1kW and R2 = 10kW, and a load resistor connected at the output, RL = 1kW.a. Find the values of v1, i1, i2, vO, iL, and iO.b. Determine the voltage gain (vO/vI), current gain (iL/iI), and power gain (PO/PI).
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explain the four functional blocks on an oscilloscope and describe the major controls within each block
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A flow is described by velocity field V=ai+bxj where a = 2 (m/s) and b = 1 (1/s) , coordinates are measured in meters. a) Obtain the equation for the streamline passing through the point (2,5). b) At t=2s , what are the coordinates of the particle that passed through point (0,4) at t=0. c) At t=3s , what are the coordinates of the particle that passed through point (1,4.25) 2 seconds earlier.
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The two pond system is fed by a stream with flow rate 1.0 MGD (million gallons per day) and BOD (nonconservative pollutant) concentration of 20 mg/L. The rate of decay of BOD is 0.3/day. The volume of the first pond is 5 million gallons and the second is 3 million. Assuming complete mixing within the pond, find the BOD concentration leaving each pond.
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Two balanced Y-connected loads in parallel, one drawing 15kW at 0.6 power factor lagging and the other drawing 10kVA at 0.8 power factor leading, are supplied by a balanced, three-phase, 480-volt source. (a) Draw the power triangle for each load and for the combined load. (b) Determine the power factor of the combined load and state whether lagging or leading. (c) Determine the magnitude of the line current from the source. (d) -connected capacitors are now installed in parallel with the combined load. What value of capacitive reactance is needed in each leg of the A to make the source power factor unity? Give your answer in . (e) Compute the magnitude of the current in each capacitor and the line current from the source.
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All brake lights are dimmer than normal. Technician A says that bad bulbs could be the cause. Technician B says that high resistance in the brake switch could be the cause. Which technician is correct?a. Technician A onlyb. Technician B onlyc. Both Technician A and Bd. Neither Technician A nor B
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An 80-percent-efficient pump with a power input of 20 hp is pumping water from a lake to a nearby pool at a page 101rate of 1.5 ft3/s through a constant-diameter pipe. The free surface of the pool is 80 ft above that of the lake. Determine the mechanical power used to overcome frictional effects in piping. Answer: 2.37 hp
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The annual average insolation (energy of sunlight per unit area) striking a fixed solar panel in Buffalo, New York, is 200 W*m^2, while in Phoenix, Arizona, it is 270 W*m^2. In each location, the solar panel converts 15% of the incident energy into electricity. Average annual electricity use in Buffalo is 6000 kW*h at an average cost of $0.15 kW*h, while in Phoenix it is 11,000 kW*h at a cost of $0.09 kW*h.1. In each city, what area of solar panel is needed to meet the average electrical needs of a residence?
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Which of the following is an activity of daily living? jogging cleaning weightlifting all of the above
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