What is the power output of the turbine?
Steam at 1400 kPa and 350°C [state 1] enters a turbine through a pipe that is 8 cm in diameter, at a mass flow rate of 
The exhaust from the turbine is carried through a 25-cm-diameter pipe and is at 50 kPa and 100°C [state 2].
The volumetric flow rate into the pipe is the mass flow rate times the specific volume 
The cross-sectional area of the inlet pipe is 
so the average flow velocity is 0.020024/0.005027 = 
. At steady-state, the mass flow rate out must be the same as the mass flowrate in. So, if the specific volume at the outlet conditions is 
, then the volumetric flowrate out is 
. The cross-sectional area of the 25 cm diameter exit pipe is 
, so the velocity is 
Now, we can use this in the energy balance for an open system
We will assume that the heat loss from the turbine is negligible (Q = 0) and that the change in elevation from inlet to outlet is negligible (?z = 0), so the work output of the turbine is given by:
W=
= –46.81 kW. Our sign convention for W is that it is work done on the fluid, so the work output from the system is 46.8 kW.
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If little or no resistance is felt while operating the temperature control lever, the problem is most likely which of the following?
a. the heat control valve is seized
b. There is a vacuum leak between the intake manifold and control valve
c.
When power is applied to the ____________________ lamp, the heating elements heat up, lowering the resistance of the gas within the glass tube.
Fill in the blank(s) with the appropriate word(s).
As water in a system heats up and cools down, what accommodates the changes which take place in terms of volume?
What will be an ideal response?
The Fairfold family decided to buy a super ski and water sports boat. They took out an $80,000, 5?year, 6% per year, compounded semiannually loan with monthly payments from First Bank and Trust (FB&T). After making only two payments, a banker friend offered to make them a better deal: a 5?year, 4.2% per year, compounded semiannually loan with no transfer fee to his bank and a complete repayment no-fee-required of the remaining principal to FB&T. The principal on the new loan will be the remaining principal from the current loan. Answer the following questions for the Fairfolds as they deliberate this new offer.
(a) What is the current monthly payment on the $80,000 loan? (b) What is the current principal due on the current loan? (c) How much interest have they already paid in the first two payments? (d) What is the amount of the new monthly payment starting with month 3, if the new loan offer is accepted?