# Spindle: Wood Processing Essay Example

Initially we obtained a piece of pine wood that would be manipulated Into a spindle. We hammered the live and dead centers into the each of the ends of the wood so that there would be an imprint of the two centers where the wood would be able to dovetail into the lathe. After the center Imprints were made, we used the hand planer to flatten the corners of the wood to help round It out before we put It on the lathe. Once the corners were flattened, we started on the lathe. We first had to put a bit of linseed oil In the Imprint of the dead center on the wood.

Then we put the wood on the two centers of the lathe securely so when It starts spelling It will stay on the lathe and not shake loose. After everything on the lathe was ready to go, we turned the lathe on and used the round nose to round the whole piece of wood Into a cylinder. Once we had the wood down to the correct diameter, we took sandpaper and sanded down the wood while It was spinning on the lathe to get rid of the any ridges so that it was round and smooth. Now that the spindle was rounded off and smooth, we started on making the beads.

## Chemistry Lab: Weight Of Different Objects

The purpose of this week’s Lab is to find the weight of different objects and record my findings/data. I will record my data on a chart. My observations will determine why each scale has a different weight for the same object being weighed. The two techniques practiced here are direct weighing and weighing by difference. The skills required vary depending upon the kind of balance used. In this lab I will practice the techniques required to use a centigrade balance and electronic balance.

In general, efferent substances have the same exact densities even if they occupy the same volume or have the same mass. Throughout this experiment I was weighing the same items on different scales and I was very surprised by the results. Direct weighing simply requires learning how to read the mass directly from the balance. Weighing by difference requires recording the mass of an object in a container, recording the mass of the container only, and then calculating the mass of the object by subtracting the mass of the container from the mass of the object in the notation.

The centigrade balance has two-decimal place points and the electronic balance has three-decimal place points. Each balance displays a different weight for the same objects. Procedure First you will need to weigh a slug on a centigrade balance using the direct-weighing technique. The centigrade balance can be found under the balances option under the equipment menu. Select the centigrade balance and add one slug from the chemicals dialog box. Record the slug mass in the observations. Weigh the same slug directly n another centigrade balance.

Obtain a second centigrade balance from the balances option under the equipment menu and place it under the first centigrade balance so that the pans line up under each other. Select the centigrade balance with the slug and choose pour/decant from the procedures menu. Record the mass of the slug. You will repeat these steps for the next experiments, which are, weighing by difference and weighing the unknown. Observations and Results Part l: Centigrade Balance Direct weighing method: Mass of slug _3. 5 Mass of beaker 49. 6 Mass of beaker + slug 52. 65 Mass of slug 3. 05 Part II: Electronic Balance Mass of slug _3. Egg Weighing by difference: 50. Agog 53. Egg 3. Egg Part Ill: Average Mass of Copper Slug With an Electronic Balance Number Slugs Weighed Mass 2 5. Egg 3 8. Egg 4 1 1. Egg 5 13. Egg Average 8. 61* Part lb. Determining the Mass of Unknown Weights Unknown (#1 -Fee) Mass of beaker + unknown 74. Egg Mass of unknown 24. Egg Unknown (#2-Fee) 75. Egg 25. Egg Discussion

After completing this experiment, I now know that weighing the same object on an electronic balance would weigh slightly more than on a centigrade balance. It is also important to always make sure the centigrade balance is set to zero for an accurate reading. Conclusion I found out that the unknown objects weigh more than the mass of a slug and a beaker combined. To find the mass of the objects alone, I would subtract the mass of the beaker and the object/beaker combined to fugue out the weight of the object. This was a pretty interesting experiment to be a part of.

## Models Of Biological Incomprehensibilities

Building models of Biological Incomprehensibility’s: 1 . Which functional groups are involved in budding a covalent bond between these amino acids? Amine and Carboxylic acid = Amide 2. When the covalent bond is built between Elaine and glycogen, which functional group will Elaine use for peptide bond? Carboxylic Acid 3. When the covalent bond Is built between Elaine and glycogen, which functional group will glycogen use for peptide bond? Amine 4.

When the covalent bond Is built between glycogen and Elaine, which functional roof will Elaine use for peptide bond? Carboxylic Acid; the NOON group of forms the peptide bond. 5. When the covalent bond is built between glycogen and Elaine, which functional part 2: Fat. Questions: 6. Which functional group will be given by glycerol? OH Group (alcohol) 7. Which functional group will be given by butyric acid? Carboxylic Acid 8. What is a difference between fatty acids found in fats and oils? Saturated fats are solid (butter) unsaturated fats are liquid (olive oil) and are double bonded 9.

Apart: Carbohydrates. . Which functional groups are Involved making the glycoside bond? Alcohol 2. How many sugars are contained In a disaccharide? Give example of a disaccharide. Two Sucrose (Maltose) 3. 4. Complete the table below (Table 1). Table l: Name of the Carbohydrate Names of component sugars Source of the carbohydrate and function Maltose Glucose, Glucose Wheat/ Barley 2 Sucrose Glucose, Fructose Sugar Cane, Fruit 3 Lactose Calaboose, Glucose Milk 4 Starch Glucose (poly) Potatoes 5 Cellulose Cotton Part 5: Nucleic Acids

DNA and RNA are two main types of nucleic acids in a cell. DNA is the stored genetic information in an organism while RNA has many different functions such as serving as a messenger for protein synthesis, making ribosome, participating in protein synthesis and regulatory roles. Complete the following table (Table 2) about the composition of DNA and RNA. Table 2: Sugar Phosphate present? Nitrogen base DNA 2 didgeridoos Yes RNA Ribose Yes (No T, Replaced with U) 1 . What is the difference between ribose and didgeridoos?