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Determine the maximum spectral emission power of the human and the wavelength at which this emission occurs? What is the wavelength below which 50%of the human emission is concentrated?
Stating any assumptions you make: i) When will the project break even? ii) Draw a cash flow diagram for 3 years from the start of R&D. iii) Compute the present worth of the project.
You plan to continue this for 4 years: i) Draw the cash flow diagram ii) How much will there be in the account at the end of 4 years. Show all work for rating.
Find the temperature of the steam at the inlet of the closed feedwater heater. Mass flow rate of steam extracted from the turbine for the closed feedwater heater, the net power and thermal efficienc
Heat is slowly removed from the steam during a constant pressure process, such that 197.6 kJ of moving boundary work is done by the surroundings on the steam. Determine the quality of the steam at t
A fixed quantity of air at T1 = 60oC and P1 = 158 kPa is heated at constant temperature in a piston-cylinder assembly until its volume has increased by 130%.
A fixed quantity of air at T1 = 100oC and P1 = 243 kPa is heated at constant pressure in a piston-cylinder assembly to T2 = 203oC.
Derive the intersection coordinates, for the first quadrant, for the following curves: a- Modified Goodman with Langer Failure Criteria and with the load line b- Gerber with Langer Failure Criteria.
A 120 mm diameter hole is punched in the center of the plate. What is the factor of safety of the plate under the load conditions?
An undeformed specimen of some alloy has an average grain diameter of 0.04 mm. You are asked to reduce its average grain diameter to 0.010 mm. Is it possible?
If the slip occurs on a (111) plane in [1-10] direction, and the critical resolved shear stress is 30 MPa, calculate the magnitude of the applied tensile load necessary to initiate slip.
Determine the rate of entropy generation during this process in steady operation. How much of this entropy generation occurs within the iron?
Determine the vertical component of the reaction at the points A, B, and C. Determine the moment of the reaction about the point A.
The drum rolls without slipping on the surface of the conveyor with an angular velocity of 12 rad/s. What is the velocity and acceleration of point a relative to an earth fixed coordinate system?
Calculate the distance that the person needs to walk to get back to their start point and the direction that they need to take.
A child of mass 20 kg is standing on a plank inclined at 20 degrees to the horizontal. How much force does the child exert normally (perpendicularly) against the plank?
The remaining stress components are all zero. For this state of stress, determine the sum of the normal strains x, y and z directions: that is, determine the madnitude of e1+e2+e3.
Evaluate the maximum possible efficiency. Actual efficiencies of less than 3% can be achieved. Determine the thermal efficiency of the system based on the ammonia Rankine system and for a 100 MW pla
The rest exits through a diameter of 1.5 m with a pressure of 0.7 bar and a quality of 90%. Determine the velocity at each exit duct, in m/s.
On a cloudless day, the sunlight that reaches the surface of the earth has an intensity of about 1.2 103 W/m2. What is the electromagnetic energy contained in 5.6 m3 of space just above the earth's su
How much should Mr. Jones put in the bank today to cover the maintenance of the car for the five years? Assume that the bank gives 8% interest, compounded annually.
Assuming that the speeding vehicle is approaching the police car essentially head-on, determine the speed of the vehicle.
Derive the equation of motion of the simple pendulum (consisting of a point mass m, attached to a rigid wall by a string of length L) using the energy method.
Determine his velocity and acceleration when he reaches B. this is a motor cycle going down an arc from pt a to pt b. rho is 300ft, and the angle from a to b is 60 degrees.
The time it takes for sound waves to travel at 343 m/s through the air between the astronauts equals the time it takes for the electromagnetic waves to travel to the earth. How far away from the ear