Steam issues from the nozzle of a De-level turbine at a velocity of 1000 m/s at an angle of 20ᵒ. The
blade velocity is 300 m/s and blades are symmetrical. The mass flow rate is 0.5 kg/s and a friction
factor is 0.8. With the help of velocity diagram, determine 1) Blade efficiency 2) Power developed 3)
Stage efficiency if the nozzle efficiency is 95%

.   If you have $30,000 invested in each of two stocks and $20,000 invested in each of another three stocks and the betas on the stocks above are 0.8, 1.1, 1.0, 1.2 and 1.4, respectively, what is the beta of your portfolio, and what is the required return on the portfolio if the risk-free rate is 4.6% and the return on the market portfolio is 10.4%? What are the risk premiums for the market and for your portfolio?

Suppose that, in the absence of insurance, the daily demand for visits to a clinic is given by Qd = 200 – 0.5P, where c is the coinsurance rate and P is the price charged by the clinic.

a. Calculate the quantity demanded when P is $100.

b. Calculate daily revenues when P is $100. Now assume that customers pay a coinsurance rate,

c. You will need to modify the demand function to account for the coinsurance. See page 105 of the Bernell text for some tips. c. Calculate the quantity demanded when P is $100 and the coinsurance rate is 0.4.

d. Calculate the daily revenue for the values given in (c). e. Calculate the quantity demanded when P is $100 and the coinsurance rate is 0.8.

f. Calculate the daily revenue for the values given in

(e). Assume the clinic’s daily capacity is 100 customers.

g. Calculate the price the clinic should set to exactly use its entire capacity when there is no insurance (i.e., the coinsurance rate is 1).

h. Calculate the price the clinic should set to exactly use its entire capacity when there is a coinsurance rate of 0.8

In a​ study, researchers wanted to measure the effect of alcohol on the hippocampal​ region, the portion of the brain responsible for​ long-term memory​ storage, in adolescents. The researchers randomly selected 13 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm3. An analysis of the sample data revealed that the hippocampal volume is approximately normal with x̅ = 8.09 cm3 and s = 0.8 0.8 cm3. Conduct the appropriate test at the α = 0.01 level of significance.

State the null and alternative hypotheses.

H0​: μ

▼

greater than>

not equals≠

less than<

= __?__

H1​: μ

▼

greater than>

equals=

not equals≠

less than<

__?__

​(Type integers or decimals. Do not​ round.)

Identify the​ t-statistic.

t0=__?__

​(Round to two decimal places as​ needed.)

Identify the​ P-value.

​P-value=__?__

​(Round to three decimal places as​ needed.)

Make a conclusion regarding the hypothesis.

▼

Fail to reject

Reject

the null hypothesis. There

▼

is not

is

sufficient evidence to claim that the mean hippocampal volume is

▼

less than

greater than

equal to

__?__ cm3.

Anemia (low healthy blood cells or hemoglobin) has an important role in exercise performance. However, the direct link between rapid changes of hemoglobin and exercise performance is still unknown. A study investigated 18 patients with a blood disorder (beta-thalassemia). Participants in the study performed an exercise test before and the day after receiving a blood transfusion. Data are given in the table.

2. Is obesity associated with a RER greater than 1.1?

a. State the Null Hypothesis

b. Which test statistic would you use and what is the observed value

c. What conclusion would you reach (justify)?

Suppose x has a distribution with μ = 45 and σ = 13.

(a) If random samples of size n = 16 are selected, can we say anything about the x distribution of sample means?

Yes, the x distribution is normal with mean μ x = 45 and σ x = 13.

Yes, the x distribution is normal with mean μ x = 45 and σ x = 3.25.

Yes, the x distribution is normal with mean μ x = 45 and σ x = 0.8.

No, the sample size is too small.

(b) If the original x distribution is normal, can we say anything about the x distribution of random samples of size 16?

No, the sample size is too small.

Yes, the x distribution is normal with mean μ x = 45 and σ x = 0.8.

Yes, the x distribution is normal with mean μ x = 45 and σ x = 3.25.

Yes, the x distribution is normal with mean μ x = 45 and σ x = 13.

(c) Find P(41 ≤ x ≤ 46). (Round your answer to four decimal places.)

Suppose x has a distribution with μ = 82 and σ = 13. (a) If random samples of size n = 16 are selected, can we say anything about the x distribution of sample means? Yes, the x distribution is normal with mean μ x = 82 and σ x = 0.8. No, the sample size is too small. Yes, the x distribution is normal with mean μ x = 82 and σ x = 3.25. Yes, the x distribution is normal with mean μ x = 82 and σ x = 13. (b) If the original x distribution is normal, can we say anything about the x distribution of random samples of size 16? Yes, the x distribution is normal with mean μ x = 82 and σ x = 3.25. No, the sample size is too small. Yes, the x distribution is normal with mean μ x = 82 and σ x = 0.8. Yes, the x distribution is normal with mean μ x = 82 and σ x = 13. Find P(78 ≤ x ≤ 83). (Round your answer to four decimal places.)

A synchronous generator has parameters as shown in table below.

1. An inductive load of 30MW at 0.8 power factor at rated terminal voltage is connected to the synchronous generator to an infinite bus. Determine the excitation voltage per phase and its corresponding power angle. Sketch a phasor diagram for this condition.?
2. With reference to (a), without losing synchronism, what will be the maximum power the generator will be
   able to deliver? Also, determine the armature current at this condition.?
3. Turbine torque is reduced until generator output is 15MW while excitation is held constant as in (a) above,
   determine the power angle, armature current, and power factor.?
4. If now the load has changed to a rated power at rated voltage load, with a leading power factor of 0.8,
   determine the percentage voltage regulation of this generator.?