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Determine (a) the temperature at which the normal stress in the aluminum bar will be equal to -90 MPa, (b) the corresponding exact length of the aluminum bar.
The work done by the propane is measured as 42.4 kJ. Kinetic and potential energy effects can be ignored. Determine whether it is possible for the work measurement to be correct.
A piston-cylinder assembly 0.28 m^3 of gas expands in a path pv^1.2 = constant until the pressure drops from 860 kPa to 400 kPa. If the internal energy does not change, how much heat must be transfer
At the turbine exhaust the steam velocity is 150 m/s, the pressure is 10 kPa, and the enthalpy is 2510 kJ/kg. How many megawatts of power are generated by the turbine?
The inventory, required components, and profit for each product appear in the following table. Determine how many of each product to make in order to maximize the profit.
Using the finite different method with six equally spaced nodes along the fin in the x-direction, determine (a) the temperatures at the nodes, (b) the rate of heat transfer from the fin for W=1 m, a
If their velocities measured relative to the cart are 3ft/s to the right and 2 ft/s to the left, respectively, determine the velocity of the cart while they are walking. They are 20ft apart.
A bare-footed person whose feet are at 32C steps on a large aluminum block at 10C. Treating both the feet and the aluminum block as semi-infinite solids, determine the contact surface temperature.
The mass is released from rest in the position x=1m. use numerical integration with delta x =0.01s to determine the position and velocity of the mass for the first 5 steps.
Is linear momentum of the system conserved? Why or why not? Determine the angular velocity of the combined body just after impact (in terms of L, m and v).
Calculate the steady-state creep rate (in hr-1) if the bar has a tensile stress of (4.6x10^1) MPa at (2.45x10^2)oC. Assume that the activation energy for creep is 140 kJ/mol.
If the spar has a cross sectional area of 10 mm x 20 mm, how many hours will the spar last based on the data in the graph provided?
The fraction of liquid and vapor is such that when heated the steam will pass through the critical point. Calculate the heat transfer when the steam is heated from the initial state at 14.7 psia to
If the motor supplies a cable force of = (8 + 20)N , where is in seconds, determine the power output developed by the motor when = 7s.
To dramatize the loss of energy in an automobile, consider a car having a weight of 4900 that is traveling at 35. If the car is brought to a stop, determine how long a 100- light bulb must burn to exp
Calculate the temperature of the air after expansion. Also calculate the adiabatic work done 1W2. Calulate 1W2 when 1Q2=-40 kJ/kg.
The lower portion is 4 inches wide and 3 inches tall. Overall height is 5 inches. If the maximum shear stress in the cross section is 0.77 ksi then determine the shear force.
Determine the maximum deviation of the transmission angle within the limits of the motion of the mechanism when link d is fixed.
Overall height is 5 inches. if the maximum shear stress in the cross section is 0.77 ksi then determine the shear force.
A four-link kinematic chain has the following link lengths: a = 20 mm; b = 50 mm; c = 70 mm; d = 90 mm. Determine the type of four-bar mechanism obtained when each link is considered fixed one at a ti
Assuming ideal gas behavior with k=1.4 and negligible effects of kinetic and potential energy for the air , determine the rate at which work is done by the air on the piston, in kW.
A nitrogen line, 540 R, 75 lbf/in2. is connected toa turbine that exhausts to a closed, initially empty tank of 2000ft3. Calculate the work of the turbine assuming constant specific heat
Neglecting the water resistance to the horizontal motion of the platform, determine the speed of the platform after a and be jump at the same time.
The tanker truck is capable of delivering 1200 gal each trip (there are 7.48 gallons in one cubic foot and 3.2808 feet in a meter) How many deliveries should be arranged?
It enters the nozzle at 100 psi, 200 F with a velocity of 100 ft/s and exits at a pressure of 25 psi at a low velocity. No work is exchanged between the nozzle and its surroundings. Calculate the ex