Halon and Inert Gas Design.

Halon and Inert Gas Design.

1:The post has two asighnments

Halon and Inert Gas Design Assignment

1. Determine the weight of HFC-227ea required to protect an enclosure 20 ft. wide, 40 ft. long, and 8 ft high, at an ambient temperature of 60oF, and an elevation of 6,000 ft., using a 9% design concentration.

2. Determine the weight of IG-541 required to protect and enclosure 12 ft. wide, 12 ft. long and 10 ft. high, at an ambient temperature of 75oF, and an elevation of –3,000 ft., using a 40% design concentration.

2:The Moon

write a 3-4 page essay (12- point, double spaced, plus appropriate figures or diagrams, and references) on a selected historical (pre-medieval) topic related to the Moon.

Include the following in your essay
• for a particular ancient culture, or archaeological site, describe current evidence for that culture’s observations of the Moon (even if that evidence is not fully conclusive)
• describe how the observations relate to the phase or position of the Moon
• can choose an ancient lunar calendar system instead of (or in conjunction with) an archaological site
• for the same culture, discuss a myth or cultural story or interpretation of the Moon
• in-text citations and references in APA or MLA format
o see https://spark.library.yorku.ca/creating-bibliographies-citing-sources-part-of-academic-culture/
• any relevant diagrams or images (include reference) of sites, drawings, etc.

Section 1 questions:

1.1. Describe how the phase and any other aspect of the Moon’s appearance changed over the course of the 4-5 night period, where the observations were made at approximately the same time each night.
1.2. How did the position of the Moon change on your location diagram over the course of the 4-5 night period, where the Moon was observed at the same time each night?

1.3. Why do you think the Moon changed its position in the sky over the 4-5 night period, where the Moon was observed at the same interval each night?

1.4. How did the Moon change its size, phase and position, over the 10-week period?

1.5. Give a full explanation for why the Moon changes its phase throughout its cycle. Include a diagram in your answer, and give a reference for your diagram.

Section 2 questions:

2.1. How did the size of the Moon change over the series of observations made in a single night? If there was a change, explain why.

2.2. How did the phase of the Moon change over the series of observations made in a single night? If there was a change, explain why.

2.3. How did the position of the Moon change over the series of observations made in a single night?

2.4. Explain why the Moon changed its position
Additional questions:

3.1 Sketch the configuration of the Moon, Earth and Sun for
(i) a lunar eclipse
(ii) a solar eclipse

3.2 Why don’t we see eclipses every month?

3.3 Sketch a possible configuration for the Sun, Earth and Moon when we see the Moon in the morning sky (around 11am). What phase of the Moon does this correspond to? (i.e. waxing or waning, gibbous or crescent)

Inert Gas

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