1. A nuclear medicine source made of 32P with half-life of 14.3 days emits beta particles at 0.70 MeV. Ten grams of 32P concentrate in a tiny tumor in the bladder after injection. The activity is initially 1.0 x 1010 Bq. Compute the dose (in units of Gy) delivered at the tumor two half-lives after injection. For a more accurate answer, you should integrate the dose rate over time as the source strength changes due to radioactive decay.

(TAX SYSTEMS AFTER CORONA IN EGYPT)

(Deadline: Thursday, 11 June)

You are individually required to prepare and write a research paper about the suggestions and the changes that should be made on the tax systems in Egypt after the Coronavirus pandemic. You must show your point of view and explain the reasons for the suggestions that you made in your research. Your research report should be based on the following topics that were covered throughout the semester:

•   Building Reality Tax (BRT) (10 points)

4a. Explain which biosafety cabinet is most suitable for a procedure that involves animal cells and flammable solvents.

b. A vessel disinfection procedure must be modified to sterilize the vessel. What types of changes in the procedure might be proposed?

c. Explain why TLV-TWA values cannot be used as a measure of relative toxicity of chemicals. 4d. Explain why maintaining a work environment at chemical concentrations below the TLV-TWA does not guarantee prevention of any adverse health effects for workers.

Threw has recently issued two bonds with semi-annual payments of R50. One bond has maturity of 2 years and the other one has a maturity of 10 years. Both bonds currently sell at par R1 000, with a yield-to-maturity (YTM) of 9%.

Required:

3.1. Calculate the price of each bond if the YTM drops to 6%. [4]

3.2. Calculate the price of each bond if the YTM rises to 10%. [4]

3.3. Comment on the pattern observed as a result of these changes. [2]

An economy on the balanced growth path experiences a natural disaster. A hurricane destroys
50% of the economy’s population and 75% of its capital stock. Show the path of the following
variables (Note: your answer should consist of a graph of a variable or the log of a variable on
the vertical axis, and time on the horizontal axis) and explain the changes over time to the following variables.
A) Capital and production per worker (k and y)
B) Employment N
C) Capital stock K
D) Output Y

A survey found that? women's heights are normally distributed with mean 63.9 in and standard deviation 2.4 in. A branch of the military requires? women's heights to be between 58 in and 80 in.
a. Find the percentage of women meeting the height requirement. Are many women being denied the opportunity to join this branch of the military because they are too short or too? tall?
b. If this branch of the military changes the height requirements so that all women are eligible except the shortest? 1% and the tallest? 2%, what are the new height? requirements?

When the analysis is warranted, more credit will be given for answers that use the diagrams presented in class. More credit will also be given for answers that include a “story” providing an intuitive explanation of the situation. For stats-book questions, more credit will be given for more specific answers.

The prices of products and the wages paid to labor each change over time. Describe how prices and wages have changed over time. For your description of wage changes, include a description of how nominal and real wages change

How would we make a schematic design for a vending machine that accept nickels, dimes, and quarters, and sells drinks at 30 cents each? (disregard changes and there is only 1 type of drink) 2 Hexdecimal values must show the current money input (binary to hexadecimal converter is given), and when the value hits 30 or more, reset the current amount to zero, and LED should be lit to represent a successful. For the flip flop, D-flip flop should be used for simplicity.

Over the past several years, there have been increases in the number of farmers markets throughout the U.S. Additionally, during this period, the number of farmers markets accepting SNAP EBT (electronic benefits transfer of food stamps) increased as well. Explain in words the effect such simultaneous changes might have had on the market price and quantity of vegetables in the U.S. And explain the specific economic mechanisms involved. (Only use information given in this question; do not consider implications of the current pandemic.)

Consider the standard Keynesian ISLM model of the economy.

a.    How does a change in animal spirits which inspires fear of investment effect ISLM?
b.    How does this effect the aggregate demand and supply?
c.    What will happen to the level of output and price level in the short run and in the long run?
d.    Illustrate the above process by deriving the IS and LM before and after the shock, showing the change in aggregate demand and/or aggregate supply, and by showing the short run and long run changes of P and Y