Mechanical Engineering Answers

The diameter of the 9th dark ring in the newton’s ring experiment is 0.28 cm. What is the diameter of

16th dark ring? Given the wavelength of light used is 6000 A0

. Calculate the radius of curvature of the

lens used.

Determine the root of f(x)=x³-6x²+11x-6.1 using the Newton-Rapson Method(three iterations, x_i=3.5)

Determine the root of f(x)=sinx+cos(1+x^2)-1 where x is in radians. Use 4 iterations of the secant method with initial guesses of xi-1=1.5 and xi=2.5

A point moves along the path Y= (X/3) with a constant speed of Sm/s. What are the X and Y components of velocity when X=3m? What is the acceleration of point when x=3m!

 A steam turbine operates under steady flow conditions receiving steam at following state:-Pressure =10 bar, specific internal energy = 2800kJ/kg, specific volume = 0.2 m3/kg Velocity =100m/s. The exhaust of steam from the turbine is at 0.2 bar, with specific internal energy = 2200 kJ/kg, specific volume =15 cu.m/kg and velocity = 300 m/s. The intake is 3m above the exhaust. The turbine develops 25 kW and heat loss over the surface of turbine is 30 kJ/kg. Determine the steam flow rate (kg/s) through the turbine.

 Steam at 15 bar is passed through a throttle valve with a pressure drop of 12 bar. The temperature after throttling is 150 °C.

Q.4 The dryness fraction before throttling is

Simple two stage (effect) parallel flow multi-effect evaporation unit with vapour compression A two-effect thermal vapor-compression system is designed at the following operating conditions: Motive steam ms: Ps: Ts mm; Pm Tm Feed water mf 1 mt2 Cooling Sea water md2 mev: Pev: Tev Demiater (1) (2) Intake Heating Sea water Steam mm md1 Down condenser md2-mev md Distillate Condensate mb 1 mb2 mb Rejected brine mev The areas of the exchangers are equal: Ae1=Ae2 - Boiling temperatures, T61= 75°C; Tb2, of 70°C; Feed water temperature; T= 65°C. - Motive steam pressure, Pm = 800 kPa. - Brine reject concentration, Xb= 60,000 ppm; Intake seawater salinity, Xp = 30,000 ppm - Intake seawater temperature, Tcw = 15°C System capacity, ma= 1 kg/s Determine the specific heat transfer area, the entrainment ratio, and the flow rates of: entrainment vapor; motive steam; supply steam and cooling water, and the performance ratio.

I need help answering the questions in unit 6 worksheet #3 in the "Graphic Language for the skilled trades" book

 A thin steel cylinder, 400 mm in diameter with closed ends, is rotated at a speed of 5 000 r/min about a longitudinal axis through its centre. If it is simultaneously subjected to an internal pressure of 4 MPa, calculate the thickness of the cylinder, assuming that the maximum allowable tensile stress is limited to 170 MPa. The density of the steel is 7 800 kg/m

A thin rim with a mean diameter of 1.2 m and cross section of 15 mm ×200mm rotates at 800 r/min. Calculate change in diameter due to rotation if E=200GPa and density is 7800kg/m^3