Mechanical Engineering Answers

In a reversible non-flow process with a gas, the initial pressure and specific volume are 270 psia and 4 cu. ft/lb, respectively. The final pressure and specific volume are 80 psia and 9 cu. ft/lb. The process is defined by the equation pv^(3/2)=C, where p and v are simultaneous values of pressure and specific volume at any instant during the process and C is a constant.
Find the work done on or by the gas during the process, BTU/lb.

At a pressure of 100 psia and 400 deg F, the specific volume of steam is 4.934 cu. ft/lb, and the specific enthalpy is 1227.5 BTU/lb. Find the internal energy at the given state, BTU/lb. attach solution.

air enters a compressor with a density of 1.2 kg/m3 at mean velocity of 4 m/s in the 6 cm x 6 cm square inlet duct. air is discharged from the compressor with a mean velocity of 3 m/s in a 5 cm diameter circular pipe. determine the mass flow rate and the density at outlet?

you see a sudden flash light,then 6 seconds later you hear the thunder.take the speeds of sound and light as 340ms^-1and3*10^8ms^-1,respectively.how far away was the lightining strike?

a car accelerates with a constant acceleration of 1.2ms^-1 along a long straight road.how long does it take the car to accelerate from 100kph to 110kph,and how far does it travel while doing so?

janes brother andrew leaves home for school at 8:00 am.he walks at 3.3kph.at 8:20 am jane discovers that andrew has left his homewirk at home .she decides to follow him on her bicycle and give him his homework,but she wants to be back home in time for an online test at 9:00 am .what is the minimum constant speed at which she needs to ride?

A car with a mass 700 kg accelerates uniformly from rest to a velocity of m s-1 in a time of 10 s. the frictional resistance to the motion of the vehicle is assumed to be constant throughout at 0.5 kN. calculate the force accelerating the car.

What is y groove crackability test ?

A binary system A-B exhibits complete ranges of liquid ad solid solution, assuming that the solid and liquid solutions are Raoultian in their behaviour. (1) Calculate the temperatures as a function of compositions of component A in the range from 1212 to 1683 K with an increasing interval of 50 K; (2) Calculate both the solidus and liquidus lines; and (3) Draw both the solidus and liquidus lines on a plot, of which the horizontal axis is the compositions of component B, and the vertical axis is the temperature (K). Given: ∆

a transmission shaft supporting two pulleys A AND B and mounted between two bearing C1 and C2 . power is transmitted from pulley A&B .the shaft is made of plain carbon steel 45c8 syt is 380 & sut is 600 the pulleys are keyed to the shaft . determine the shaft diameter the ASME code if Kb is 1.5 and Kt is 1.0 .also determine the shaft diameter on the basis of torsional rigidity if the permissible angle of twist between two pulleys is 0.5 degree and the modulus of rigidity is 79300N/mm^2. Forces are 2000 & 500N