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Write a program that accepts a numerical value x from 0 to 100 as input and cmputes and displays the corresponding letter grade given by
Determine the final temperature in both tanks if a valve connecting the two tanks is opened and the mass equalized (mf1=mf2) very quickly then closed again.
A 0.2 m^3 rigid tank initially contains refrigerant 134a at 1 MPa, saturated vapor. Determine the mass of refrigerant that has entered the tank (kg).
The exit pipe goes up an elevation of 80 ft above the water level in the well, where the water runs into an open channel. If adiabatic process is assume the water temperature remains constant. Find
It is desired to inflate a baggie with a volume of 904 milliliters by filling it with oxygen gas at a pressure of 0.865 atm and a temperature of 283 K. How many grams of O2 gas are needed?
What percentage increase in volume takes place in the contents of a kerosene tank when the tempeature is raised from 4oC to 325k?
What is the maximum length of longitudinal through crack that can be permitted with a safety factor of 3, if the material has a fracture toughness Kic=50 MPa sqrt(m)?
Use only two iterations and take t = 2 and t = 3.5 seconds as the initial guesses. What is the estimate at the end of the second iteration?
In a power plant operating on a Rankine cycle, steam enters the turbine at 500 lbf/in2 and 800F and expands to 2 lbf/in2 and a quality of 92%. Determine the net work developed per unit mass of steam
Determine the load required to compress the specimen to a height of (a) 62 mm and (b) 58 mm assuming that the cross section increases uniformly.
In a laboratory, scientists produce 233Th90 from 238U92 by two different processes. Calculate the total energy in MeV required for both processes.
A steam turbine receives steam at 110 ft/s velocity and 1525 Btu/Ibm enthalpy. The steam leaves at 810 ft/s and 1300 Btu/Ibm enthalpy. What is the work out in Btu per pound mass flowing?
If the block is pulled down 100 mm from equilibrium and released from rest when the external force begins to act (at t = 0), what is the equation of motion of the suspended mass, y(t)?
If the crate starts from rest and achieves a speed of 10 m/s in 5s determine the magnitude of P. the coefficient of kinetic friction between the crate and the ground is mu k = 0.2
Determine the velocity at which the oxygen leaves the nozzle, assuming that it enters with negligible velocity, treating the oxygen as an ideal gas with temperature variable specific heats and using
If D= 10 cm, h=.6 cm and Q=0.380 m^3/s, what are the velocity In the pipe and the acceleration at point A where r =20 cm?
An electric resistance heater in the tank transfers energy to the water at a constant rate of 60 W for 2.5 hour. Determine the final temperature of the water in the tank, in°C and the final pres
Determine the amount of heat transfer Q that must be done during this proccess for the given initial and final conditions.
A pot of 1kg of liquid water is heated on a mountain top. How much heat must be added to bring the water to its boiling point (i.e., make it a saturated liquid)?
Superheated water vapor initially at 15 bar and 440°C is cooled at constant pressure to a saturated vapor state and is then cooled at constant volume to a final temperature of 120°C.
Using the Kelvin-Planck statement of the second law of thermodynamics, demonstrate the following corollaries: a. The coefficient of performance of an irreversible refrigeration cycle is always less.
First, assuming no heat transfer between the rock and air and no other losses, what is the initial velocity of the stone as it left the catapult in [m/s]?
The system is cooled in a two-step process: i. 1-2: Constant volume cooling until only saturated vapor remains ii. 2-3: Constant temperature cooling until only saturated liquid remains For process 2
A cylinder containing 0.9 kg of ammonia has an externally loaded piston. Find the total work for the process, assuming a piecewise linear variation of P versus V.
The vessel is placed at time t=0 into a thermal reservoir with constant temperature T_res=50 degrees C. How much heat must be transferred into the glass vessel to turn all the water into a saturated