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On the assumption that the tension required to keep a sample at a constant length is proportional to the temperature (t= aT) show that the tension can be ascribed to the dependence of the entropy on
Show that after the clamp is released the flow rate decreases exponentially with time. How to set up the problem to prove that the flow rate decreases exponentially with time?
The on-board acclerometer records and acceleration level of -.7get+.5gen. If you know that the v at this instant is 200km/hr, what is the tracks radius of curvature at this instant?
When a small pebble is dropped into a liquid, small wave travel outward.Using these variables, determine a set of PI terms that could be used to describe this problem.
Calculate using volume and temperature as your independent variables the heat that must be supplied into the unit per mole of n-butane that passes through the compressor.
Can metals be produced in an amorphous state and how? Which ceramic materials are most likely to be crystalline and which more likely to be amorphous?
What is the force in newtons exerted on the gas by the atmosphere, the piston, and the weight, assuming no friction between piston and cylinder.
The heat of melting for water is 155 Btu/lbm. Assum that all of these quantities are independent of temperature. Determine the final phase of the water in the tank.
Use constant specific heat at 300K and find: the compression ratio the specific work of compression the highest pressure in the cycle.
Find the compression ratio and the mean effective pressure. Use constant specific heat Cv =.171 Btu/lbm degree R. Is this suitable for modeling a gasoline engine?
Water in a piston-cylinder assembly with an initial volume of 0.01m3 has an initial temperature of 120C and an initial quality of 0.4 (State 1).
If the flow rate of water is measured to be 0.03 m3/s, determine the irreversible head loss of the system and the lost mechanical power during this process.
Determine the temperature when thermal equilibrium is reached and the amount of heat transferred to the egg. Energy absorption or release associated with any chemical and/or phase changes within the
Determine the volume change from initial state to final state, the work done during this process with standard sign convention, and the heat transfer during this process.
Determine the work done and the heat transfer during this process. Also indicate the sign (or direction) of the work and heat.
Determine the total exergy destruction of a Brayton cycle with a source temperature of 1800K and a sink temperature of 310K.
Intake temperature at each compressor is 300K, and the intake temperature at each turbine is 1200K. The compressor efficiency is 80% and the turbine efficiency is 85%. Find the back work ratio.
Draw a P-v diagram labeling the initial and final states, and including the vapor dome on the diagram. Determine the quality when piston first lifts off of the stops.
The collar is attached rigidly to the top end of the externally threaded member. Determine the force required at the end of the 6-in handle to develop a 150-lb clamping force. dc=1 in.
Find the temperature rise of the bullet assuming the impact occurs so rapidly that the impact process can be considered to be adiabatic.
Determine how long it will take for the insulated back of the acrylic to reach its softening tempature, Tsoft = 90 C. The initial acrylic tempature is Ti = 20 C.
From the time the current is applied, how long does it take for the wire to reach a tempature that is within 1 C of the steady-state value?
Which of the following polymers should you select for this application to replace polystyrene: (1) ABS, (2) Nylon 6,6 and (c) PP copolymer? Give reasons.
The pressure inside the cylinder is held constant at 300 kPa during the process, and a heat loss of 60 kJ occurs. Determine the electric energy supplied, in kWh.
Using contineuaty, momentum, and energy equations along with perfect gas law. Show how the flow at station 2 may be determined from conditions at station 1.