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A steel shaft with a diameter of 40mm and length of 1.1m transmits 60hp from an electric motor to a compressor. If the allowable shear stress is 50MPa and the allowable angle of twist is 1.5 degrees
The allowable stress in a steel shaft with an outside diameter of 1.5in and an inside diameter of 1.1in is 12,000psi. What hp can the shaft deliver at 1750rpm
Draw the influence line for the tension in cable BC. Neglect the thickness of the beam, What is the maximum tension in the cable due to the 6-k loading
When making hardness measurements, what will be the effect of making an indentation very close to a preexisting indentation. Why.
It is possible to produce cast irons that consist of a martensite matrix in which graphite is embedded in either flake, nodule, or rosette form. Briefly describe the treatment necessary to produce
For a ternary system, three components are present; temperature is also a variable. What is the maximum number of phases that may be present for a ternary system, assuming that pressure is held cons
The surface energy of a single crystal depends on crystallographic orientation. Does this surface energy increase or decrease with an increase in planar density
What point defects are possible for MgO as an impurity in Al2O3. How many Mg2+ ions must be added to form each of these defects.
(a) Compare the crystalline state in metals and polymers. (b) Compare the noncrystalline state as it applies to polymers and ceramic glasses
Offer an explanation as to why covalently bonded materials are generally less dense than ionically or metallically bonded ones.
A 6ft wide, 10ft high vertical rectangular gate has its top edge 6ft below the water level. it is hinged along its lower edge. what force, acting on the top edge, is necessary to hold the gate shut
A falling-head permeability test is being conducted on a saturated sample of clayey silt having hydraulic conductivity of 6.5 x 10-9 m/s. The diameter and the length of the sample are 100 mm and 150
A vertical pipe of 4ft diameter and 60 ft long has a pressure head of 22.7 ft of water at its upper end. when the flow of water through it is such that the mean velocity is 16 fps, the pipe friction
It is proposed to estimate the seepage flow rate through the foundation soil using the flow net sketching technique. For this purpose, calculate the horizontal scale factor and effective hydraulic
The cross-sectional area of the sample was 60 cm2 and its length was 150 mm. For 80 cm3/min steady-state flow rate, a total head difference of 8 cm was measured across two points separated by 10 cm
A 25-W compact fluorescent lightbulb (CFL) produces the light equivalent of a 100-W incandescent bulb. The population of North America is estimated to be about 305 million.
A lagoon with volume 1200 m3 has been receiving a steady flow of a conservative waste at a rate of 100 m3/day for a long enough time to assume that steady-state conditions apply.
how to determine the substrate concentration and biomass concentration at 0.5 days. Use spreadsheet to solve for the concentrations with a delta t = 0.01 days
Determine the rate of ammonia (NH4-N) utilization and the biomass growth rate for the following conditions: µm = 0.50 g VSS/g VSS-d Ks = 0.50 mg/L X = 10 mg/L S = 40 mg NH4-N/L
Suppose an air pollutant with rate constant k= 0.20/hr is emitted into the box at a total rate of 10.0 kg/s. Find the steady-state concentration if the air is assumed to be completely mixed.
To maintain a pressure of 300kPa at point 2, what the 15 C water is flowing at 0.5 L/s, what pressure must be provided at point 1 if you neglect friction
A pressure gage at elevation 4.8 m on the side of a storage tank containing oil reads 34.7 kPa.Another gage at elevation 2.2 m reads 57.5 kPa. Compute the specific weight, density, and specific grav
Part of a vertical piping system consists of 8 ft of 4 in diameter, connected to 8 ft of 3 in diameter above, and connected to 8 ft of 2 in diameter above that. Water at 60 F flows up the pipe (no d
A bug is crawling up the leg of a man on a train. The velocity of the bug relative to the man is 0.3 m/s k . The mas is waling from one side of a carriage to the other with a vlocity relative to the t
A random sample of 50 suspension helmets used by motorcycle riders and automobile race- car drivers was subjected to an impact test, and on 18 of these helmets some damage was observed.