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what is the role of solid state diffusion in (i) case hardening of steels, (ii) creep processes in nickel base super alloys, and (iii) phase transformations in metals and alloys ?
An Aluminum rod is made in the form of a hollow square tube, 2.25 in outside, with a wall thickness of .120 in. Its length is 16.0 in.
a) Briefly describe the following strengthening methods: (i) solid solution strengthening, (ii) dislocation substructure strengthening, (iii) grain size strengthening.
Air enters the compressor of an air-standard Brayton cycle at 100kPa, 300K, with a volumetric flow rate of 5m^3/s. Find the Net power developed in kW versus pressure ratio.
Assume that this process is reversible. (a) Draw a schematic to illustrate the device (b) Find the heat transfer to the water and the work input to the heat pump.
Sketch the cycle on p-v and T -s diagram. Determine T2, in R. If the cycle is a power cycle, determine its thermal efficiency.
Ball B of the same mass in a perfect elastic collision. What is the speed of ball A before the impact? What is the motion of balls A and B after the impact?
A 2.5 pound block B is moving with a velocity v0=6 ft/s as it hits a 1.5 pound sphere A which is at rest hanging from a cord attached at point O. What is the distance traveled by the block after the
The ram of a pile driver has a mass of 800 kg and is released from rest 2 meters above the top of a 2400 kg pile. What is the velocity of the pile immediatley after the impact?
What is the speed of the puck just before the impact with the wall? What is the magnitude and direction of bouncing puck after the impact with the wall?
For a metal that has a yield strength of 401 MPa and a plane strain fracture toughness KIc of 21 MPa m1/2, compute the minimum component thickness for which the condition of plane strain is valid.
Sketch ball temperature versus time for 0(b) Find the expression for the ball temp as a function of time,T(t), and plot the ball temp for 0.
What is the mass flow rate of water? What is the average convective heat transfer coeff on the inside of the tube?
The smooth path has an arbitrary shape. Prove the speed it attains when it reaches point A when it falls freely through the distance, h.
The car A has a spring attached to its front. Determine the maximum compression of the spring mounted on car A. Neglect rolling resistance.
Air at a stagnation pressure of 450 Kpa and stagnation temp of 400K flows through a converging nozzle whose throat area is 12 cm^2. Compute mach number, pressure, temp- before and after shock.
Using Navier-Stokes equations show that the pressure field within the liquid is constant i.e. P=Patm and the velocity profile is u=[g/(2n)]y2-(gh/n)y+V. What is the power used by the belt to draw up
When it is initially filled with gas, at 100 deg c what is the internal pressure? how safe is it? cylinder specs: thickness = 0.055", outer diameter=1", L(effective)=3.25".
The plate is 2m long and .2m wide. the temperature of the air 1mm from the plate is 80 C. The local convective heat transfer coefficient would expected to be?
Mass of the balloon fabric may be neglected. Determine the required balloon volume if The balloon is filled with hot air at 400 K.
At a surface cutting speed of 190 m/min the productive tool life was 60 minutes. Assuming that Taylor's Tool Life Equation applies calculate the constants 'n' and C.
how much higher the momentum will raise the person if the water is shut off at the moment the platform reaches 10 m above the ground. How much time would the person have to jump off the platform ont
The 8 kg sack slides down the smooth ramp. if it has a speed of 1.5m/s when y=.2m. Determine the normal reaction the ramp exerts and the rate of increase in the speed of the sack at this instant. y
Determine the cost of the power required, incents per liter of water delivered. Compare with the cost ofwater , assuming 0.05 centers per liter, andcomment.