4. Consider a reheat–regenerative vapor power cycle with two feedwater heaters, a closed feedwater heater and an open feedwater heater. Steam enters the first turbine at 12.0 MPa, 520C and expands to 0.6 MPa. The steam is reheated to 440C before entering the second turbine, where it expands to the condenser pressure of 0.006 MPa. Steam is extracted from the first turbine at 2 MPa and fed to the closed feedwater heater. Feedwater leaves the closed heater at 200C and 8.0 MPa, and condensate exits as saturated liquid at 2 MPa. The condensate is trapped into the open feedwater heater. Steam extracted from the second turbine at 0.4 MPa is also fed into the open feedwater heater, which operates at 0.3 MPa. The stream exiting the open feedwater heater is saturated liquid at 0.3 MPa. The net power output of the cycle is 100 MW. There is no stray heat transfer from any component to its surroundings. If the working fluid experiences no irreversibilities as it passes through the turbines, pumps, steam generator, reheater, and condenser, determine (a) the thermal efficiency, (b) the mass flow rate of the steam entering the first turbine, in kg/h. (Turbine and pump isentropic efficiencies 100% & Create a table of all values)

A 95 lb child is being treated with diazepam for muscle relaxation. The recommended dose for the child is 0.2 mg/kg q6-8h prn. Diazepam is available as a 5 mg/5 mL oral solution.
What volume of medication should the child receive per dose?

Calculate the standard deviation of the following returns. Year Return 1 0.23 2 -0.08 3 0.03 4 -0.09 5 0.17 Enter the answer with 4 decimals, e.g. 0.1234.

Calculate the variance of the following returns.

Year Return

1 -0.2

2 -0.08

3   -0.08

4   0.19

5 0.21

Enter the answer with 4 decimals, e.g. 0.1234.

Assume that the per-worker production function is y_t = 10∙k_t^1/2. Further, assume that the saving rate, s = 0.2, the depreciation rate, ?=0.4, and the population growth rate, n= 0. Calculate the following:

The steady-state values of the capital-labor ratio, k* , output per worker, y*, investment and saving per worker, i* and s*, and , and consumption, c*.

Assume that the per-worker production function is y_t = 5∙k_t^1/2. Further, assume that the saving rate, s = 0.2, the depreciation rate, ?=0.04, and the population growth rate, n= 0. Calculate the following:

The steady-state values of the capital-labor ratio, k* , output per worker, y*, investment and saving per worker, i* and s*, and , and consumption, c*.

Country Alphaduck Country Bisonville MPL of duck feathers 20 10

MPL of wood 4 1

Which of the following is true for the table above?

The international relative price of wood is between 5 and 10.

Country Alphaduck has the comparative advantage in duck feathers

The international relative price of wood is between 0.1 and 0.2.

Country Bisonville has the absolute advantage in wood

The thickness, t, (mm) was recorded versus absorption, A, (c/s), and the results are shown in the following table. thickness ,t, mm Absorption ,A, c/s 0.2 5500 5 3720 10 2550 20 1320 27.5 720 32.5 480 1) Plot the data on the graph paper. 2) Find the equation that best fits the relationship between thickness and absorption.

rony wants to estimate the percentage of all aub students who study only a week before their exams. he has decided to obtain an 85% Confidence interval for the proportion of the undedicated students. he will ask a random sample of n aub students about their studying habits. if he wishes to obtain a CI with a precision width of 0.2, how large should the sample be?  

A car and the suspension system are a damped spring, mass system, with a natural frequency 2 Hz and a damping coefficient 0.2. The car drives at speed V over a road with sinusoidal roughness. The roughness wavelength is 20 m, with a amplitude of 50 cm. What speed does the maximum amplitude of vibration occur? What is the corresponding vibration amplitude?

Please do not use an older solution.

Part A: Define actual and theoretical mechanical advantage, using words as well as equations.

Part B: What law of physics forbids the efficiency of an actual machine from being equal to 1? (100% efficiency)

Part C: What is the efficiency of a wooden ramp (μ =0.2) at an angle of 39 degrees?

Part D: Is a screw an example of a wheel and axle, lever, or inclined plane?