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Knowing that E=0.45x10^6 psi, determine (a) the reactions at A and C, (b) the normal stress in each portion of the rod.
Shearing stresses on the directions normal and tangential to the weld are σ=12ksi and τ= 7.2. Determine the magnitude p of the largest axial force that can be applied to the pipe.
Then it is isothermally compressed to state 3. Draw the diagram of the process on a PV chart and find the equation for total work.
If the specific internal energy of the gas decreases by 29.8kJ/kg during the process, determine the heat transfer, in kJ. Assume kinetic and potential energy effects are negligible.
A 100 lbm liquid-vapor mixture of water in a rigid container with a volume of 3 ft3 at a temperature of 100oF is heated until the system becomes a single phase. What is the heat transfer of the proces
Evaluate the thermal conductivity of the soda lime glass at 300 K. If the aircraft has 130 windows and it costs $1/kWh to heat the cabin.
When being chargerd by a 40 volt DC supply, find the time, t for vc to reach 20 volts after the charging process has started if C=200μF and R=10kΩ.
Calculate the number of years it takes to pay off loan in one equation, if yearly income is $120,000 and suppose yearly payment is $10,000 and the total debt is $45,000?
The R-134a undergoes a process that increases its volume by 40 percent. Calculate the final temperature and enthalpy of the R-134a.
A particle travels along the circular path x²+y²=r². If the y component of the particle's velocity is Vy=2rcos2t, determine the x and y components of its acceleration at any instant.
The motion of the partice is defined by the realtions r=b(2+cospit) and theta=(pi)t. Where t and theta are expressed in m and radiains. Determine (a) the accleration and velocity of the partice when
What change in the given data would have to be allowed if each set were to be used? Calculate results for at least four different sets and state reasons for your final choice.
If the scrap metal density, in kg/m^3, varies with position z, in m, according to density=7800-360(z/L)^2, determine the reading in the scale, in N.
The clearance between the members is 14 in. Determine the required length L of each splice if a factor of safety of 2.75 is to be achieved.
What is the average cost per kWh with green power during the year? why does green power cost more than conventional power?
The initial pressure and temperature of the air are 400kPa and 200C, respectively, while the final temperature is 100C. Determine the work for the air system and sketch the process.
Determine the static head efficiency required of the turbine if the total pressure of its exhaust is not to be less than 1.6 bar and the exhaust velcotiy is 300 m/s.
What diameter should the hovercraft deck be to operate at this condition, and what will be the resulting hover gap height? Assume the density of air is 1.17 kg/m3.
Knowing that E = 3.2 GPa, that the maximum allowable normal stress is 40 MPa, and that the length of the thread must not increase by more than 1%, determine the required diameter of the thread.
Use the van der Waals equation to calculate pressure p and compression factor z. Are attractive or repulsive forces between Ar atoms dominating under these conditions?
The vessel is heated until the water pressure reaches 8 Mpa. Determine the following properties of water at the final state: temperature, enthalpy, internal energy.
Draw the triangles of velocities for inlet and outlet and find (i) the angles of vane tips (ii) the work done per Newton of flowing water efficiency.
Consider the pumps and turbines to operate adiabatically and to all have isentropic efficiencies of 85%. The net power output of the cycle is 1 x 109 Btu/hr. Calculate the mass flow rate of steam th
What is the gage pressure at the bottom of the tanks? in kPa. What is the absolute pressure at the bottom of the taanks assuming standard atmospheric conditions? in kPa.