To make sure that all three parts are lined up properly, we will use the CD disk as a measuring device, and mark the spots where the slit and the viewing port will go. Set the CD disk on top of the box, about a half inch from the left edge, and close to the box's bottom, as shown in the photo. Use a pen to trace the circle inside the CD disk onto the box. This mark shows us where the paper tube will go. Now place the paper tube on the box, centered over the circle we just drew. Draw another circle on the box by tracing the outline of the paper tube. Move the paper tube over a little bit. A half-inch is probably fine -- in the photo I placed it much farther to the right than necessary, but the aluminum tape covered up the mistake nicely. Trace another circle around the paper tube. These circles will tell us where to cut the box. Now cut an oval out of the box with a sharp knife. The oval will allow the paper tube to enter the box at an angle. The next step is to make the slit. Turn the box one quarter turn so the oval we just cut is to the right. Using the CD disk again, draw another small circle close to the left side of the box. The slit will be on the far left of the box. Cut a small rectangle out of the box at the height marked by the small circle we made with the CD disk. The rectangle should be about a half inch wide, and two inches high. Carefully unwrap the two razor blades, and set them over the rectangular hole. Make their sharp edges almost touch. Tape the razor blades to the box, being careful to leave a gap between the sharp edges that is nice and even, and not wider at the top or bottom. Next, set the box right-side-up, with the slit towards you. Now tape the CD disk onto the back wall of the box. The rainbow side should face you, with the printed side touching the cardboard. The photo shows the disk a little too far to the left. The left edge of the disk should be the same distance from the left of the box as the slit is. Now seal up any places on the box where light might leak in. Use the aluminum tape for this. You can also use aluminum foil for this purpose if you don't have any aluminum tape. The last step is to use the aluminum tape to attach the paper tube. The aluminum tape will make a light-tight seal around the tube. To make sure the angle is correct, hold the slit up to a light, and look through the paper tube, adjusting it until you can see the full spectrum from red to purple. Once you have assembled your spectrometer with the instructions in the lecture and above, use it to examine the spectra of three different light sources. Make sure that at least one of them is the sun or moon, but the others can be incandescent lights, compact fluorescent bulbs, LED lights, halogen or xenon bulbs, televisions, computer screens, candles, fireplaces, etc. Then, answer the following questions in a separate document: Describe the differences in appearance among the three spectra. What feature of the light source do the spectra represent? In other words, what is it that you are actually analyzing? Why do you think spectrometers are so valuable for studying celestial objects? Part 2: Estimating the Number of Visible Stars in the Night Sky For this, you will need an empty toilet roll and a clear, dark night. Before you start, jot down the number of stars that you think you can see in the night sky. Aim your toilet roll at a part of the sky well above the horizon to avoid any haze pollution. Hold your roll steady and allow your eyes to get used to the light for a few seconds. Count the number of stars that you can see within through the roll. Do this four more times in other parts of the sky, and average the five counts. The viewing diameter of a toilet roll is about 1/135th of the entire sky, at least for a relatively flat area. Mountains, buildings or large trees will obscure some of the sky. To determine the number of visible stars, multiply your average by 135. Answer the following questions: 4. How similar is this to your original estimation? 5. What percentage of our galaxy do you think that we can see with the naked eye from Earth? Part 3: Solar System Please answer the following questions: 6. Why do you think that the inner planets are relatively close together, but the outer planets are spaced so widely apart? 7. Why do you think that the gaseous planets are gaseous, but the inner planets are not? Sent from Corey's iPhone

Overview Process modeling is an important part of systems analysis and design. It requires you to think through the different processes that make up a larger system. As you refine and expand a process model, you break down each process until you have a picture of the full system. Process modeling helps you think through how your system works and helps you see how to make the system more efficient. In this assignment, you will be asked to think through how a process model applies to a specific scenario. You will be given a data flow diagram, which is one type of diagram used for process modeling. This data flow diagram illustrates the current purchase and supply process for a retail store. You will be asked to describe the processes that could be enhanced to add an online storefront for the business. Your work on this assignment will help support your work on the module application short paper for Project One. Prompt Hamp Crafts is a family-owned craft store that has been in business for decades. Its current operations are limited to its physical (brick-and-mortar) storefront. Recently, the owners have determined that one of the best ways to gain additional revenue is through online sales. The online sales process is new to the owners. They need to fully understand how online ordering works, and how it can be integrated with their current in-store purchase and supply process. You are a systems analyst working with Hamp Crafts to modernize their business. First, you will analyze their current purchase and supply process for items in their brick-and-mortar store. Then you will suggest ways to integrate new processes for an online storefront. Review the following data flow diagram and description of Hamp Crafts’ current purchase and supply process for their brick-and-mortar store. A text version is also available: Module Three Assignment Data Flow Diagram Text Version. Hamp Crafts’ current purchase and supply process uses a local secure merchant account. All the transaction funds are collected and transferred to the company's primary business account within two business days. Employees are assigned to check the inventory system to ensure all orders are processed in a timely manner. Communication regarding inventory shortages or delays in delivery is a manual process for Hamp Crafts if a potential shortage occurs. Otherwise, the inventory specialist and order fulfillment team input information into the local database regarding order statuses and tracking of shipments. Describe Hamp Crafts’ current purchase and supply process by responding to the following prompts: Interpret the provided data flow diagram. What does it show? What does the current purchase and supply process entail? What are the data sources involved in the current process? For the new online storefront, Hamp Crafts’ owners want to ensure that customers can easily view products, pay for them, and receive confirmation of their orders. The owners want to be sure that any payments will be transferred to Hamp Crafts’ business account. You have also suggested adding an administrative backend to provide customer support, update customer information, and maintain the website. In order to add this functionality, you will need to consider Hamp Crafts’ current purchase and supply process. Then you will need to determine the additional requirements needed to support an online storefront by responding to the following prompts: What additional processes are necessary to integrate an online storefront? What additional data sources would the system need to access the products and inventory? What additional databases, if any, are needed to support the online storefront?