HISTORY SUBJECT:

Which of the advances of the Scientific Revolution was the most significant? Why?

It describes the properties of dangerous goods, but which of the following is incorrect? (1) Yellow phosphorus is a white or pale yellow aromatic waxy solid. (2) Calcium phosphide is a reddish brown lump and reacts with water to produce toxic gas. (3) Calcium carbide is pure white solid. When nitrogen is passed at a constant temperature, it becomes lime nitrogen. (4) Sodium is a bright silver-white metal with a specific gravity of less than 1. (5) Potassium is a bright silver-white soft metal with a specific gravity of less than 1 and a lower melting point and boiling point than sodium.

We are in an extraordinary and frightening period of world history, facing the type of crisis that, hopefully, we only see once every century or two. You know that two or three years from now, Hollywood, if it survives, will be releasing the “Corona Virus Film”, whether that is the appropriate or ethical thing to do or not.

         What do you think this film will look like? How will filmmakers look back in time and tell the story. Sadly, we do not know where we will be in a few years and what the true global impact will be. For this assignment, I want you to be the filmmaker. What story do you tell? How do you tell it? What characters and visuals do you use to tell the story? Where do you set it? What is the ending? We are all a small part of this film you are creating. Please be thoughtful, respectful and creative in your work. This is a crisis that is impacting all of us and your film needs to reach a global audience.

         Your paper should be between two and three pages,

Please select one section of the geologic time scale and do the following:

1. Select one part (either a period or an epoch).

2, What types of fossils can be found? What about major rock types? Geologic conditions? Geologic structures?

3. What types of organisms lived during this time?

4. Where there any major geologic events (massive volcanism, meteorite impacts, extinction events)?

5. Include references where you found your information.

facilities services use a “cooling with dehumidification” system campus-wide. The system is designed to have two stages where in the first stage, the moist air is cooled down while the condensate is exctracted to dehumidify the mixture. Then, in the second stage, the saturated moist air is heated up using heating coils that utilize steam. Assume that the operating pressure is uniform at 1 atm. On a typical hot and humid summer day, air enters the air-conditioning system at 30◦ C with 90% relative humidity and is supplied to the air-conditioned spaces at 18◦ C and 60% relative humidity:

(a) Clearly mark the inlet and exit states of this air-conditioning process on a standard psychrometric chart (use Figure A-31 from your textbook). Also, show on this chart the complete air-conditioning process in between the inlet and exit states.

(b) Calculate the amount of condensed water that will be extracted from the moist air per unit mass of the dry air (in kg H2O/kg of dry air) inside the dehumidifier?

(c) Assume that moist air enters this system at a volumetric flow rate of 100 m3/min. Determine the mass flow rate of dry air (in kg/s) throughout the system.

(d) Determine the rate of heat removed from moist air in the cooling/dehumidifier section (in kJ/s or kW)

(e) Determine the rate of heat added to moist air in the heating section (in kJ/s or kW)

(f) Assume the steam system that is used for heating the moist air stops working due to a malfunction. Determine the temperature of the saturated moist air that will be supplied to conditioned spaces (in ◦ C)

(g) Technicians work on restoring the steam power for the heating section but the system is at 50% operational conditions. Determine the temperature (in ◦ C) and the relative humidity of the moist air that will be supplied to the conditioned spaces.

How is the seasonal cycle different in the Northern Hemisphere versus the Southern hemisphere and how does this affect levels in CO2?

Case Study

This case study is about the nuclear disaster of Chernobyl in 1984. It covers all the ethical mistakes and aspects involved in the occurring of the disaster. The ethical dilemmas, responsibilities, whistle blowing & cultural norms of engineers are discussed in it.

The Chernobyl disaster was a catastrophic nuclear accident that occurred on 26 April, 1986 at 1:23:45 AM at the No. 4 nuclear reactor in the Chernobyl Nuclear Power Plant, near the city of Pripyat in the north of the Ukrainian SSR. It is one of only two nuclear disasters rated as INES 7, the maximum severity classification.

The accident started during a safety test on a common Soviet reactor, the RBMK type.

A very large amount of energy was suddenly released vaporizing superheated cooling water and rupturing the reactor pressure vessel in a highly destructive steam explosion. This was immediately followed by an open-air reactor core fire. The core fire released considerable airborne radioactive contamination for about nine days which precipitated onto parts of the USSR and Western Europe, before being finally contained on 4 May 1986. The radioactive contamination dispersed over this period was approximately the same amount as that released during the initial explosion. Thirty-six hours after the accident, a 10-kilometre exclusion zone was created, with the rapid evacuation of 49,000 people, primarily from Pripyat, and this was increased from 10 to 30 km shortly after when a further 68,000 persons were evacuated, including from the town of Chernobyl itself.

From years of research we know what technically went wrong in Chernobyl disaster. Write few things, what “Ethically” went wrong while keeping in mind following points.

Question number 1:

1. Discuss awareness of professional, social and ethical responsibility of engineers in the disaster [CLO1,PLO6]                                                                                                                                          5                                                                               
2. Should the engineers have blown the Whistle? [CLO2, PLO8]                                                              5                                                                 

Question Number 2:

1. Choose different dilemmas in engineering practice of Chernobyl disaster according to ethical behavior? [CLO3,PLO7]                                                                                                                                       5
2. Explain the impact of personality and cultural norms on engineer’s responsibilities in the Chernobyl scenario? [CLO4, PLO6]                                                                                                                         5

What of the following statements is true for refracting telescopes?

• The main focusing optical piece is a mirror
• It is mostly used by professional astronomers
• The main focusing optical piece is lenses
• It is easy to build a large telescope.

How can yoy differentiate Slate from shale?

A liquid stream ,F, containing A and B is fed to a distillation column.

• Given:
• Mole fraction of A in the feed is 0.650.65
• A is the more volatile component
• The q-line equation is y=1.3461538461538x+1.525
• The distillate mole fraction is 0.9; The reflux ratio, R,=3.1

If the rectification operating equation is of the form y = mx + b (in terms of the more volatile component):
1) What is the slope, m, of the rectification operating line? (Correct answer is 0.75610)
2) What is the intercept, b, of the rectification operating line? (Correct answer is 0.21951)
3) What is the intersection of the feed and rectification operating lines, x , y? (Correct answer is 0.620995, 0.689045)

*The correct answers are there please show work on how to get the answer given*

For SO2 oxidation, a mixture of 28% SO2 and 72% air is fed into the flow reactor with a volumetric flow rate of 1500 L/s. The following reaction is carried out at 14.7 atm pressure and 227°C temperature. 2SO2 + O2 = 2SO3 2 2 (-Ra )= 200(L / mol.s) .Cso2.Co2

a) Create a stoichiometric table.

b) Find the concentrations of the components fed to the reactor.

c) Find the CSTR reactor volume required for 60% conversion.

d) If a PFR reactor was used at the same volume of CSTR, what would be the conversion rate and what would be the component concentrations at the reactor outlet

6. L’Oréal (a large multinational cosmetics manufacturer) has launched ‘Make-up Genius’ which is a smartphone app that allows consumers to see how L’Oréal cosmetics will look when applied to the customer’s face. Consumers can buy L’Oréal products directly from the app.

a) In general, what functions are performed by channel intermediaries?

b) Explain how the functions performed by channel intermediaries in the sale of cosmetics may change as a result of the introduction of this app.

c) Discuss the advantages and disadvantages to L’Oréal of this new product.

Liquid nitrogen and carbon dioxide can be used as a refrigerant in many food freezing applications. You are assigned by the project manager to investigate and report on the suitability of both liquid nitrogen and carbon dioxide in chilling meat products for the new frozen meat production line. In your report.

Explain the thermodynamics properties that allow nitrogen and carbon dioxide to function as a refrigerant in food freezing applications.