Sam+H


 * Wiki assignment #1**[|David Agus]

I choose to watch the video of David Agus because I do know people who have suffered from cancer and I am very interested in medical science. He first explains how to diagnose cancer and what cancer is. He also says that it is a disease of the aged that you are more likely to get cancer when you are older then when you are a child. He also says that there is no proof that chemotherapy actually hits the cancer cell. Another thing he talks about is systems and this means the inputs into our body like enivironments and diet, the outputs are the symptoms the cancer patients have. He showed a lady who had reoccuring cancer and she had a tumor in her body. To cure this tumor they gave her a pill normally used for acne one month later she was cured and even six months later she was still fine. David also says that if we try to slow the disease instead of reducing the size of the disease we will have a better chance of patient survival. I learned that we have so much to learn about cancer and that there are many different ways we can go about treating it.

Boyle's Law goes with the 1st picture of a person pulling the end of a syrienge. Boyle's Law says that if the volume of the gas increases the pressure will decrease. When the person pulls back on the end of the syrienge the volume of the air inside will increase but the pressure will decrease. The temperature in the syrienge will stay constant so this is a perfect example of Boyle's Law.
 * Wiki assignment #2**

Charle's Law corresponds to the 2nd picture of the hot air balloon. In Charles Law he states that the pressure will stay the same and the gas volume will increase and so will the temperature. In the hot air balloon the volume of the air will increase when it is heated but the pressure will stay sssthe same.

Gay-Lussacs Law I remember in class a heart shaped balloon had liquid nitrogen poured onto it which made the balloon compress and then when it started to heat up the balloon started to expand. This is because in Gay-Lussacs Law when the gas gets cold the volume decreases but when it gets warm the volume increases.

One way to clean up oil spills is skimming which can only be done if the clean up crew gets to the spill within one to two hours. Long buoyant booms that hang over the water skim across it and collect the oil which is then sucked up into containment ships. Another way is to burn the oil but that can produce a very toxic gas and is not done by shorelines.
 * Wiki Assignment #5**

Solubility- is a property of a solid, liquid or gas that will dissolve into a homogeneous Temperature- the higher the temperature the solubility decreases for liquids and solids. But for gases the higher the temperature the solubility increases Stirring-stirring a substance will decrease the solubility of the solution Surface Area- the bigger the surface area the more soluble the solute is

Rate of Dissolution- is the process of attraction of molecules in a solvent Temperature- higher temperatures will increase the rate of dissolution because the solvent molecules will be moving around faster and make make more contact with the solute. Stirring-increases the rate of dissolution because more fresh solvent will be brought to the solute Surface Area- the bigger the surface area is the faster the rate of dissolution will be

Temperature- as you increase the temperature the reaction rate will increase but if you decrease the temperature the reaction rate will slow down. If you have a glass of water and you heat it up the molecules will move around more and collide with each other more causing the water to evaporate more quickly. If you have an ice cube and you put it in the oven at 100F it will dissolve faster then if it is on the counter at room temperature because the molecules are moving quicker in the oven.
 * Wiki Assignment #6**

Concentration- if you increase the concentration of a reactant the reaction rate will increase because it is more likely to collide with eachother if there is more of the solution. this video shows how the amount of concentration affects the reaction rate http://www.youtube.com/watch?v=kjKyEdrVXJA

Catalyst- it increases the reaction but when the reaction is over you have the same mass as what you started with it does this because it lowers the solutions activation rate. this video shows how a catalyst can speed up a reaction http://www.youtube.com/watch?v=29qTPd9HQqg

Surface Area- if you increase the surface area there is better chance that the molecules will collide with eachother. Calcium carbonate will react faster with hydrochloric acid if its a powder then if it was a chunk of marble.


 * Wiki Assingment #9**

The difference between a concentrated solution and a dilute solution is that in a dilute solution the solute is less then the solvent and in a concentrated solution the solute is greater then the solvent. A strong acid has many molecules break up into ions a weak acid has very few molecules break up into ions.

In a concentrated solution with a strong acid the the acid will break up into many ions. In a concentrated solution with a weak acid there will be few ions in the solution with many of the molecules bonds still together. In a dilute strong acid solution many of the molecules will break up into ions but there will be less molecules in the solution then a concentrated solution. In a dilute weak acid solution few molecules will break up into ions and there will be few molecules in the solution.