Engineering

Based on the concept that it is better to prevent falls happening in the first place, which of the following safety methods meets that criteria?
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# derive is a kind of which dependency
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A stainless steel ball (=8055 kg/m3, Cp= 480 J/kgK) of diameter D =15 cm is removed from theoven at a uniform temperature of 350oC. The ball is then subjectedto the flow of air at 1 atm pressure and 30oC with a velocityof 6 m/s. The surface temperature of the ball eventuallydrops to 250oC. Determine the average convection heat transfercoefficient during this cooling process and estimate howlong this process has taken.
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Based on your reading of the following, how does a triple save a fire department in time?A.) Triples can extinguish fires in shorter amounts of time.B.) Triples can transport both equipment and crew at the same time.C.) Triples can arrive at the scene of a fire faster.D.) Triples can pump water faster than any other apparatus.ANSWER: B
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A driver younger than 18 years of age may not operate a motor vehicle with any passenger who is not an immediate family member until 6 months from the date that the person's driver's license was issued.O TrueO False
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Air enters the combustor of a jet engine at Pressure=10 atm, T=1000R and M=0.2. Fuel is injected and burned with fuel-air ratio (by mass) of 0.06. The heat released during the combustion is 4.50000000 ft-lb per slug of fuel. Assuming one-dimensional frictionless flow with r=1.4 for the fuel-air mixture, calculate M2, p2 and T2 at the exit of combustor?
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sorry here is my second one
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A magician claims that he/she has invented a novel, super-fantastic heat engine. This engine operates between two reservoirs of temperatures 250 K and 750 K, respectively. Please verify and explain if this is possible for any of the following QH (heat received from the hot reservoir), QL (heat rejected to the cool reservoir), and W (mechanical work produced): a. (3a). (3p) QH= 900 kJ, Wmech = 400 kJ, QL = 600 kJ. b. (3b). (3p) Qu= 900 kJ, W mech = 400 kJ, QL = 500 kJ. c. (3c). (3p) Qh= 900 kJ, Wmech = 600 kJ, QL = 300 kJ. d. (3b). (3p) Qh= 900 kJ, Wmech = 800 kJ, QL = 100 kJ.
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Pedro holds a heavy science book over his head for 10 minutes. Petro is doing work during that time. True or False
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Air at 1.00 atm is passed through a horizontal 1.5-in. Schedule 40 (steam-jacketed) steel pipe at a velocity of 2.10 ft/s and an inlet and outlet temperature of 25.0 C and 95.5 C, respectively. The pipe wall temperature is maintained at 121.1 C. (HINT: You may neglect the viscosity correction in your calculations.) a) Assuming only heat transfer by forced convection, how long must
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HELP! What are 5 changes that a fidget spinner can be?
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How do Geothermal plowerplants relate to engineering?
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Sasha goes back through her architectural design books for inspiration and designs the new country club to have a Romanesque feel, using rounded arches for the doorways and windows and constructing the walls with extra thickness to give a feeling of imposing massiveness to the building. The client is mystified by Sashas approach. He says he cant visualize it working at all and demands she rethink the entire design. What would be best for Sasha to do in response to this criticism?She should create a computer animated view of the design to walk the client through it.She should get a better idea for what the client wants and expects.She should try a different architectural style for her design.She should build a model of her design to show the client how it will look when finished.
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180 kg/h of a liquid feed enters an extraction column with 98% paraffin oil and 2% ethyl alcohol at room temperature and pressure. Liquid absorbent is 100% water. Required recovery (extraction) of ethyl alcohol from paraffin oil is 97%. Given that paraffin oil and water are immiscible with each other and the extraction column operates in a counter current fashion. Assume isothermal and isobaric conditions and that only ethyl alcohol is absorbed. Equilibrium relation between mass fractions of ethyl alcohol in water and paraffin oil is given by Xwater = 1.7544 * Xparaffin oil (a) Find minimum amount of water required (Answer 97.5 kg/hr) (b) If you have 1.5 times minimum water amount, how many equilibrium stages are required? (Answer ~ 6)
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True or false, Increasing the spring force of the pressure plate that clamps the clutch disc to the flywheel increases torque capacitybut takes more foot pressure to operate the clutch pedal.
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flhsmv lesson 6 circle the road way user who must yield the right of way
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. A fire hose with an inside diameter of 6.40 cm is connected to a water hydrant very close to the ground. The other end is attached to a nozzle with an inside diameter of 3.5 cm and is brought 8.0 m above the ground. The flow rate on the hose is 30.0 L/s. What is the pressure in the nozzle assuming the pressure inside the hose on the ground is 1.50 x 106 N/m2
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If it takes 35 s for the 50-Mg tugboat to increase its speed uniformly to 25 km/h, starting from rest, determine the force of the rope on the tugboat. The propeller provides the propulsion force F which gives the tugboat forward motion, whereas the barge moves freely. Also, determine F acting on the tugboat. The barge has a mass of 75 Mg.
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(HVAC) PLEASE HELP neeed helpp
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Iman wanted to find out at what temperature butter melts. She placed a cube of solid butter in a beaker. She put the beaker on a hot plate. She turned up the temperature dial one degree every two minutes. Then she recorded the temperature at which the butter started to melt.Iman wanted to determine if her results were reliable. She decided to repeat the experiment. Which statement describes the main purpose of repeating the experiment?to test a different substanceto see if the results are similarto practice completing experimentsto determine if butter will melt twice
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Some wire of radius is 1.262mm has a resistance of 20. Determine the resistance of a wire of the same length and material if the diameter is 1.6mm
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(TCO 3) Linear-phase filters are desirable in many applications because Group of answer choices they have a sharper frequency response. they do not cause phase-distortion of an input signal. they have better stop-band performance by eliminating side-lobes. they have the smallest number of filter coefficients compared to nonlinear filters.
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