In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa and
480 °C, while the condenser pressure is 6 kPa. Steam expands through the first-stage turbine to
0.7 MPa and then is reheated to 480 °C
a) For a pressure of 7 bar right after the first stage turbine in the ideal Rankine cycle, create
two plots: thermal efficiency as a function of the reheat temperature from 200 °C to
500 °C; and the net work, heat addition, and heat extraction on the same graph as a
function of the reheat temperature from 200 °C to 500 °C  

Proteins can move laterally in biomembranes and the lateral distance (r) traveled in a given time (t) is given by, The diffusion constant for (D) for the membrane protein fibronectin is approximately 0.7 x 10-12 cm2·sec-1, whereas that for rhodopsin is about 3.0 x 10-9 cm2·sec-1. a. calculate the distance (r) traveled by each of these proteins in 10 msec (answer in nm; be sure to circle your answers) b. what can you reasonably assume about the interactions of these two proteins with other membrane components? Your answer should be 1-4 sentences.

The population (in millions) and the violent crime rate (per 1000) were recorded for 10 metropolitan areas. The data are shown in the following table. Do these data provide evidence to reject the null hypothesis that ρ = 0 in favor of ρ ≠ 0 at α = .05? (Give your answers correct to three decimal places.)

(a) Calculate r.


(ii) Calculate the critical region.
(smaller value)
(larger value)

The experiment is about whether the concentration of sodium bicarbonate will have an effect or not on the rate of photosynthesis in spinach by recording the time taken by the leaf disks to float in the sodium bicarbonate solution with different concentrations (0.7% and 1.5%) as treatment groups and the distilled water as the control group.

Is it possible for leaf disks to float in thecontrol group (Distilled water)?

Why do you think the leaf disks floated at different times in your trial run?

What are the potential sources of error? How will you troubleshoot these when running your experiment?

On what basis will you determine the number of replicates to be used?

The experiment is about whether the concentration of sodium bicarbonate will have an effect or not on the rate of photosynthesis in spinach by recording the time taken by the leaf disks to float in the sodium bicarbonate solution with different concentrations (0.7% and 1.5%) as treatment groups and the distilled water as the control group.

Is it possible for leaf disks to float in thecontrol group (Distilled water)?

Why do you think the leaf disks floated at different times in your trial run?

What are the potential sources of error? How will you troubleshoot these when running your experiment?

On what basis will you determine the number of replicates to be used?

A rectangular footing (0.75m∙0.75m), embedded 0.5 m, carries a downward column load of 200 kN. The footing is supported on an overconsolidated clay with the following properties:

Cr = 0.05         e = 0.7             OCR = 2.0

PI = 55            cu = 200 kPa ϒsat = 16.2 kN/m3

The ground water table is at a depth of 1.0 m below the ground surface.

a) Calculate the primary consolidation settlement for this footing.

b) Is the calculated Sc within tolerable limits?

Hint: This clay deposit is very deep. Assume that the portion (or thickness) of the clay layer that will consolidate is between z = Df and z = Df + 2B.

-How can you determine the distance to a spacecraft from the time it takes its radio signal to reach Earth?

-What do gamma rays, X-rays, light, and radio waves all have in common?

-Which type of reflector telescope would be the easiest to construct, and why?

-Contrast image formation in reflectors and refractors.

-A reflecting telescope has a mirror diameter of 4.0 m. What is the angular resolution of the telescope for red light of wavelength 0.7 μm?

-What is the resolution of a telescope?

-What is true of radio telescopes?

-One advantage of the Hubble Space telescope over ground based ones is that....

Suppose you take out a 20-year mortgage for a house that costs $462,293. Assume the following: The annual interest rate on the mortgage is 4%. The bank requires a minimum down payment of 18% at the time of the loan. The annual property tax is 1.7% of the cost of the house. The annual homeowner's insurance is 0.7% of the cost of the house. The monthly PMI is $99 Your other long-term debts require payments of $730 per month. If you make the minimum down payment, what is the minimum gross monthly salary you must earn in order to satisfy the 28% rule and the 36% rule simultaneously?

Q2- Economists estimate that the supply function and demand function for the widget market is given by the following expressions: q = 0.2 · π − 40 π = −10q + 2000 π = 5q + 200 Draw demand and supply curves as a function of q and calculate;

A- the demand and price at the market equilibrium.
B- For this equilibrium, calculate the consumers’ gross surplus, the consumers’ net surplus, the producers’ revenue, the producers’ profit and the global welfare