Malik,+Nikhil

Coke and Mentos
By: Nikhil Malik

This is one of those things, I always wondered of why it happens. And after reading this article it makes more sense to why mentos and coke react. It’s due to the amount of high CO2 concentration quickly released once the mentos and coke make contact at the nucleation site. It creates a highly pressurized bottle, at which the bottle explodes or burst open similar to a geyser as seen in the article picture.

I’m glad I read this article because now I can use this knowledge for the science Olympiad event called egg-o-naut. I which I will have to create a bottle rocket that launches the highest in the air. So instead of using pressurized water I will now use coke and mento and pressurized water goes the rocket will go even further into the air.

Nikhil, That is a fascinating idea. How will you deliver the mentos at just the right moment? Great post. 5 stars! MW

Redefining The Kilogram
By Nikhil Malik

Redefining the Kilogram is an interesting and informative article. After reading this article I finally understand how important redefining the kilogram is. Most of the world uses Kilogram as the measure of weight. It is extremely important especially for the scientific community to precisely weigh out materials when doing atomic calculations. The golf ball sized platinum-irridium alloy which is used as the prototype has lost 50 micro grams in weight over the years. Not only is it's reason for loss in weight puzzling but is also disturbing because the calculations performed based on the standard may not be accurate. It is proposed that the standard of weight be changed from an arbitrary metal alloy prototype to some physical property of nature. The physical property should stay constant over time. Scientists are debating on two alternative standards for weight, one based on Planck's constant and the othe on Avogadro's number. However, I do disagree that redefining the kilogram will only impact metrologist. With this change in the standard widespread changes will have to be made wherever the weight is used. It will have a huge impact on society as a whole, if they were or were not to change it. Because they would have to go into each an every text book and change the definition of kilogram. Not only that, but also people who work with math for a living every day would have to change their calculation based on the new definition of kilogram. Furthermore, I was fascinated to know there are 90 copies of the international prototype existing throughout the world, that’s a lot of kilograms.Nikhil,Good summary! I agree that a ripple effect is possible if the kilogram is changed. 5 stars! MW

** Post# 3 ** ** Crude Oil ** By: Nikhil Malik

Crude Oil is found deep in the earth's crust, and it's made of hydrocarbons. It is a mixture of various hydrocarbons. The various components of the crude oil can be separated through a technique called fractional distillation. The crude is separated in roughly five fractions. Each fraction corresponds to a different boiling point range of the hydrocarbons present in the crude. In the distillation process the individual hydrocarbons vaporize and then condense to separate. As the first hydrocarbon with the lowest boiling point starts to vaporize, the hydrocarbon rises becoming cooler the further it gets form the heat source. The cooler it gets, starting to condense the faster it will level out going into the hole nearest to it. Based on this action at different boiling points the different hydrocarbons condense out and separate.

Nikhil, This is a decent summary but you never mentioned your MVP or most interesting point. Please follow the prompt. 4 stars. MW

Post# 4

Motion Detector By : Nikhil MAlik Three things I already knew about motion detector is that when an object blocks the light source which is aimed at a photo sensor, the motion detect can go of ( this is how most the toilet in school work, without you even flushing it). Another thing I knew was from my pervious science class (biology) I learned that light possesses both prosperity’s of waves as well as particle (photons). One last thing I knew pretty well about was a radio wave echolocation sensor. From discovery channel I learned that bat use echolocation to find there place around, and catch prey since they don't have great insight.

After reading this article I found out it was Einstein's work on the photoelectric effect that he had won the Nobel Prize in physics. Also I learned that rattlesnakes use special receptors inside their head, which allow them to see infrared spectrum. One last thing I learned was that the eye see color by visible light pushes around the electrons in a cis-retina molecule which cause domino effect of chemical reaction which result in the eyes seeing color.

Nikhil, Good post but perhaps you should use spellcheck? 5 stars. MW

**Where Do Chemical Elements Come From?**
By: Nikhil Malik

Through nucleosynthesis many elements are created in stars, when supernovas explode these elements are released throughout the universe whereby new ions and compounds are created.

Nikhil,

Well done! 5 stars. MW ="__Happy Mole Day__" Nikhil Malik was here Oct 23, 2010 at 6:02am= So where is the party ;)???? Just joking

6:02 am - Really? :) MW

=﻿Post# 6= =﻿Sugar An Unusual Explosion= By: Nikhil Malik

When you read the title sugar an unusual explosive, the two words that stick in your head are sugar the white hold house item put in various foods to make them sweet. And explosives the gunpowder, gasoline, and dynamite stuff that make a “boom” sound when explodes. When one burns sugar also known as sucrose it ignites and burns like a torch, and when this sugar is in larger ratios refined, great disasters can happen. Sadly that is exactly what happened in a ** Savannah, Georgia sugar plant in which 9 people were killed and 16 were seriously injured **. A very fine layer of sugar "dust" formed through out the work area and due to, **smaller the spherical object the greater the surface area to volume ratio**. As a result of the imperfect handling, it needed much less __//energy to combust and react with oxygen and become very explosive//__. And once the spark occurred to proceed in domino effect. The results of this fire got out of control and **completely destroyed United State's largest sugar refinery**.

(Bold)= Interseting -I had no idea the surface are to volume had anything to do with combustion?

(Italic) and (Underlined)= Relevant to class - A few chapters back in our chemisty book we learned about the diferent chemical formulas and one of them was the "combustion formula".

Nikhil, OK. You covered all bases! 5 stars! MW

=**Post# 7**= =**Helium Balloons**= By: Nikhil Malik

I found this article very interesting because of all the new stuff I learned, first of all the main idea of this whole article was that there is something called **buoyant forces which act against gravity**. **These forces act on everything but are not as strong as gravity**. Buoyant force is only **enough to lift about 0.0028 pounds (1.3g) for every liter of air the object displaces**. //__In addition to that, buoyant forces originate because the density of air at the bottom is very slightly higher than that at the top of the object.__// This means **slightly more air molecules per second hitting the bottom of an object and pushing it upward than there are hitting the top of the object and pushing it downward**.

Bold= MVP (Underlined) and (ltalic)= Relevant to class

- In chem class we learn how gas and pressure go hand to hand.

Nikhil, Interesting presentation of points! 5 stars. MW

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