1. In altera Max 7000 macrocell explain the purpose of XOR gate and different multiplexers.                                                                                                                               

Ideally environmental policy is largely shaped by scientific knowledge. However, a couple of cases show that other factors influence it too. Like the Ocean Dumping Act of 1988 and the ceasing of spraying for the Mediterranean fruit fly in California during the early 1980s. Both decisions were costly and went against prevailing scientific knowledge. What common factor(s) led to these questionable policies? What does this show about the limits of science in guiding policy?

2. Government is constrained by federalism, interest groups, checks and balances, and other features. Thus, policy is not made strictly according to scientific evidence. Is this good or bad? Weigh the costs and benefits. What considerations other than scientific evidence need to be taken into account?

3. THE HOMINID PROGRESSION 7.0 -1.0 MYA (i) The Ape Human transition (ii) The first Hominid candidates (iii) The Rise of the genus Homo (iv) Early Homo Lifestyle (v) Who was Homo erectus? (vi) Is Homo floresiensis a distinct type of hominid and if so where do they fit in the hominid progression?

a) Draw a depth profile of PO4, Cd, Si, Ba, and Pb in the Atlantic and Pacific.

a) Explain the sources and reasons for variation in the profiles that drew

c) Pick two of these elements one with a large and one with a short residence time. What can you say about the relative reactivity for each one of these elements? What process(es) controls the residence time of each element?

Discuss the purposes, advantages, and disadvantages of grafting and budding.

Cordyceps are parasitic fungi able to control the population of insects

Question 4 options:

Question 5 (Mandatory) (0.4 points)

Commensalism is a relationship between two species in which one benefits, while the other remains unaffected.

Question 5 options:

Question 6 (Mandatory) (0.4 points)

Keystone species are most often found at lower trophic levels.

Question 6 options:

Ksp = 2.6×10-9 for SrF2 at 25 °C.

a. Calculate the molar concentration of fluoride ions in a saturated strontium fluoride solution at 25 °C using the assumption that the solution is ideal -- i.e. the activity coefficients are 1.

b. Using activity coefficients determine the molar solubility of SrF2 in 0.100-M potassium nitrate solution at 25 °C?

c. Using activity coefficients calculate the maximum mass of SrF2 which can dissolve in 100. mL of 0.100 M KF?

Example 2.7 Gas Phase Reaction
Gas phase reaction is taking place in a continuous reactor. Stoicliioinetric proportions of

CO2 and H2 are fed to tile reactor at +00o C. The reaction proceeds to 80'a completion.
Given I mol of carbon dioxide, estimate the I)eat tllat dust be provided or removed, if tile
gas exit steams are to be kept at 500'C. Perform the energy balance using tile lleat of
reaction method at two reference teniperatuies (500'C and 25'C) and the beat of

formation method

Check all correct statements about the troposphere:

Question 15 options:

Radioactive Isotope #1: Uranium-238   

1. How long is its half-life?

2. How long will it take the original radioactive product to reduce by 50%?

3. How long will it take the original radioactive product to reduce by 25%?

4. What material is the best application for this isotope?

5. Describe the disadvantages and advantages of using this element for dating.

6. What is the stable daughter product?

1. What is the half-life of uranium-238?

2. What is the half-life of lead-206?

3.What is the main difference between alpha decay and beta decay?

4. Is there an application for either type of decay that is beneficial to humans?

5. During radioactive decay, which additional type of radiation is often emitted along with alpha or beta particles?

6. Why does the table not include the type of radiation discussed in question five?

7. Including your answer for question five, list the three main types of decay particles in order from least penetrating to

most penetrating. Include the type of material that stops each type of radiation.

Two boilers, one with superheater(B1) and other without superheater(B2) are delivering equal quantities of steam into a common main. The pressure in the boiler and main is 20 bars. The temperature of the steam from a boiler with a superheater is 350oC and temperature of the steam in the main is 250oC. The steam in B2 is wet steam at 20oC.

Draw a sketch of the problem with all thermodynamic properties from steam table shown on the sketch.                                                                                                         

Determine the quantity of steam supplied by the other boiler.                               

Take the heat capacity of steam, Cps = 2.25KJ/Kg.

                 hgas= hg + Cps (Tsap-Tsat)