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Thursday, 16 May 2013
Tuesday, 12 February 2013
Magic Ketchup Experiment
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A 1 liter plastic bottle
You can make a pack of ketchup float and sink at your command while it's sealed inside a bottle!
you will need
A 1 liter plastic bottle
Ketchup pack from a fast food restaurant
Salt (using Kosher salt helps keep the water from becoming foggy)
what to do
Remove any labels from the bottle and fill it all the way to the top with water.
Add a ketchup pack to the bottle.
If the ketchup floats, you're all set - go to step 4. If the ketchup sinks in the bottle, go to step 5.
For the floating ketchup pack simply screw the cap on the bottle and squeeze the sides of the bottle hard. If the ketchup sinks when you squeeze it, and floats when you release it, congratulations, you're ready to show it off. If it does not sink when you squeeze it, try a different kind of ketchup pack or try a mustard or soy sauce pack.
If the ketchup pack sinks, add about 3 tablespoons (45 ml) of salt to the bottle. Cap it and shake it up until the salt dissolves. (Kosher salt will keep the water from getting too cloudy, although it will usually clear up over time if using regular table salt.)
Continue adding salt, a few tablespoons at a time until the ketchup is just barely floating to the top of the bottle.
Once it is consistently floating, make sure the bottle is filled to the top with water, and then cap it tightly.
Now squeeze the bottle. The magic ketchup should sink when you squeeze the bottle and float up when you release it. With some practice you can get it to stop in the middle of the bottle.
How does it work
This experiment is all about buoyancy and density. Buoyancy describes whether objects float or sink. This usually describes how things float in liquids, but it can also describe how things float or sink in and various gasses.
Density deals with the amount of mass an object has. Adding salt to the water adjusted the water's density to get the ketchup to float. Sound complicated? It is, but here's the basics on the ketchup demo...there is a little bubble inside of the ketchup packet. As we know bubbles float, and the bubble in the ketchup sometimes keeps the heavy packet from sinking. When you squeeze the bottle hard enough, you put pressure on the packet. That causes the bubble to get smaller and the entire packet to become MORE DENSE than the water around it and the packet sinks. When you release the pressure, the bubble expands, making the packet less dense (and more buoyant) and, alas, it floats back up. This demonstration is sometimes known as a CARTESIAN DIVER.
Optical illusion
Thhttp://admf.co/?KWQNPXCis is optical illusion It confusing really the brain that it's moving but it's not
Blow up a ballon with yeast
you will need
A packet of yeast (available in the grocery store)
A small, clean, clear, plastic soda bottle (16 oz. or smaller)
1 teaspoon of sugar
Some warm water
A small balloon
what to do
1. Fill the bottle up with about one inch of warm water.
( When yeast is cold or dry the micro organisms are resting.)
2. Add all of the yeast packet and gently swirl the bottle a few seconds.(As the yeast dissolves, it becomes active - it comes to life! Don't bother looking for movement, yeast is a microscopic fungus organism.)
3. Add the sugar and swirl it around some more. Like people, yeast needs energy (food) to be active, so we will give it sugar. Now the yeast is "eating!"
4. Blow up the balloon a few times to stretch it out then place the neck of the balloon over the neck of the bottle.
5. Let the bottle sit in a warm place for about 20 minutes If all goes well the balloon will begin to inflate!
How does it work
As the yeast eats the sugar, it releases a gas called carbon dioxide. The gas fills the bottle and then fills the balloon as more gas is created. We all know that there are "holes" in bread, but how are they made? The answer sounds a little like the plot of a horror movie. Most breads are made using YEAST. Believe it or not, yeast is actually living microorganisms! When bread is made, the yeast becomes spread out in flour. Each bit of yeast makes tiny gas bubbles and that puts millions of bubbles (holes) in our bread before it gets baked. Naturalist's note - The yeast used in this experiment are the related species and strains of Saccharomyces cervisiae. (I'm sure you were wondering about that.) Anyway, when the bread gets baked in the oven, the yeast dies and leaves all those bubbles (holes) in the bread. Yum.
Monday, 11 February 2013
How Does Music Affect Plant Growth
Methods/Materials
First I ordered 10 fast plant seeds for the experiment. Then I built five boxes out of plywood and I fitted sound proof foam insulation. I planted the fast plant seeds in black planters and put together the reservoirs for watering. I put a planter and reservoir in each box with a CD player out front and headphones inside with the plants. Everyday for twenty days I checked on the plants and recorded their growth.
Results
Silence grew the best and healthiest followed by spoken word (Harry Potter). Classical music (Vivaldi concertos) ended up just under spoken word. Bringing up the rear was a very small and unhealthy plant that was 'listening' to heavy metal and (harsh) world music (Mudvayne and Rammstein).
Conclusions/Discussion
From my twenty five days of information gathering I have drawn the conclusion that all music/spoken word affects plant growth negatively. Some plants were affected more negatively than others. So I can just repeat an old saying, 'Silence is golden.'
The project was to find how music and spoken word affect plant growth.
Science Experiment:-Human Battery
The objective: The experiment will prove which gender produces the most electric current and in which condition do they have a greater current. The testing is done with two different types of metal plates hooked up to an ammeter. The subject then places his/her hands on the plates which gives the ammeter a reading of how strong the electric current is in the subjects body.
Methods/Materials
[1] Copper Plate [1] Aluminum Plate [1] Large block of wood [1] Micro Ammeter[x] Human test subjects [1] Sink with running water
Procedure:
1. Gather all materials
2. Set up experiment 2a. Place metal plates over wooden blocks (to keep other electric currents from reaching the plates) 2b. Set negative side of ammeter to one plate 2c. Set positive side of ammeter to other plate 2d. Turn the ammeter to 2mA
3. Have subject place each hand on a separate plate
4. Record the reading from the ammeter
5. Repeat [Steps 3&4] with different subjects
6. Have subjects thoroughly wash their hands with water and dry them
7. Repeat [Steps 3,4,&5] with different subjects
8. Have subjects jump in one spot for approximately 1 minute
9. Have the subjects rub their hands together
10. Repeat [Steps 3,4,&5] with different subjects
11. Chart the results from the data
12. Find average of both genders
13. Find average of all the different #conditions#
Results
The results of the testing showed that the Males produced a stronger current of electricity. The males average was .056 amps and .047 amps for the females. The jumping did increase the strength of the current but some males had different results and had a better current from not doing anything. These results may have had an error from the test subject. Some of the males either didnt participate correctly, or they didnt sweat enough for the correct reading from the ammeter.
Conclusions/Discussion
The experiment is important because it can be used in certain medical monitoring or artificial parts. Pacemakers can vary from person to person on how strong they need to be. We can determine the strength of a pacemaker by the gender and type conditions the person undergoes the most. Since females generate the most electricity in their bodies, they need a stronger pacemaker as opposed to males. A normal, clean, active person would need a stronger pacemaker as well.
This project will prove which gender produces the most electric current and in which condition do they have a greater current.
Science Experiment:-Creating Electric Current with a Magnet
The objective: Faraday's Law states that an electric current can be generated by passing a magnet through a coil of wire. This experiment attempted to verify Faraday's Law by using a strong heavy duty magnet, varying the number of coil windings, and passing the magnet through the coils at different speeds to see the amount of electric current created.
Methods/Materials
Wind coils using 32 gauge wire (200 turns and 400 turns). Pass a stong magnet through each of the coils. Measure the amount of electricity generated by the magnet moving through the coils by using a galvanoscope. Repeat the procedure by moving the magnets through the coils at different speeds to see the difference in the current generated.
Results
Coil with more windings produced more current and the faster the magnet was passed through the coils the greater the current generated.
Conclusions/Discussion
By inserting or removing the magnet from the windings of coiled wire, electricity was produced as predicted by Faraday's Law.
Electricity is generated by passing a magnet through coils of wire as predicted by Faraday's Law.
Sunday, 10 February 2013
Did you know?
You can't taste food without saliva.
It's possible to get sick or even die from drinking too much water
Liquid oxygen is blue.
Lemons contain more sugar than strawberries, for the same mass.
Some lipstick contains lead acetate or sugar of lead. This toxic lead compound makes the lipstick taste sweet.
Lobster blood is colorless until it is exposed to air. Then the blood appears blue.
Goldfish eyes perceive not only the visible spectrum, but also infrared and ultraviolet light.
Fresh egg will sink in fresh water. A stale egg will float.
It's possible for hot water to freeze more quickly than cold water.
You've lost about 1% of your body's water by the time you feel thirsty.
Pearls, bones and teeth will dissolve in vinegar, which contains weak acetic acid.
The hardest chemical in your body is your tooth enamel.
Frogs don't need to drink water since they can absorb it through their skin. Humans, on the other hand, have waterproofing proteins in their skin to help prevent water loss.
About 78% of the average human brain consists of water.
If you exposed a glass of water to space, it would boil rather than freeze. However, the water vapor would crystallize into ice afterward.
You can extend the life of rubberbands by storing them in the refrigerator.
Saturday, 9 February 2013
Did you know ?
Our Eyes Are Always The Same Size From Birth
From the day we are born to the death, the size of our ear and nose keeps on increasing while the mass of eyes remains unchanged.
According to scientists our eyes remain the same in size throughout our
life but our ears and nose keep gaining bits of mass as we grow older.
This may sound a little disturbing because most of us want the exact
opposite. We’re coveted to have bigger eyes but they never change size,
and fairly smaller noses and ears but they disappoint us by growing
throughout our lives.
Normally our nose grows slowly until about age 15 to 17 in women and
about age 17 to 19 in men, says Rohrich, a specialist in the field.
After these respective ages our noses keep on growing but at a very slow
rate. And the growth of our noses is always downward because of the
pull of gravity and the gradual breakdown of proteins, collagen and
elastin in your skin, especially in the nasal tip.
It is a very important part of our body which lets us smell more than
10,000 scents. As for the ears, they get bigger by 0.22mm per year on
average and the reason is almost the same as for the nose. The cartilage
in the ears also keeps growing and gravity helps the enlargement too.
As far as the eyes are concerned, they grow on average only by 7mm till
you reach puberty. That is 40% growth in the size from the original. The
eyes stop growing after puberty and if the eyes keep on growing,
there’s always a risk of myopia or short-sightedness. So if you think
about it, it’s to our advantage that our eyes don’t grow after puberty.
A New Cancer Treatment: Cyberknife Robotic Radio Surgery
New Delhi: Good news for the cancer patients. A new radiation therapy is introduced for the treatment of cancer in India. This was introduced now in Delhi as this radiation therapy has already started in some cities like Chennai and Bangalore.
The doctors say now there is no needing go for the treatment for Chennai and Bangalore as this was also introduced in Delhi. Previously the treatment for cancer had given with traditional radiation therapy but the new radiation therapy with the name Cyber Knife Robotic Radio Surgery System (CRRS) is introduced recently in Delhi. As this is one the good news to cancer patients. It also cures any kind of disease with minimal or with out any side effects to the patients. The Cyber Knife Robotic Radio Surgery System is the advanced system of traditional radio therapy system. Up to now many of the cancer patients are taking the normal radiation therapy. But the latest radiation system cures maximum cancer with less or without any side effects.
P.K Julka who is the head of oncology at all India institutes of medical sciences (AIIMS) told that we can give high dose radiation at specified location and spare the normal tissue. This technology sends high dosage in to body in one to five sections than 30 to 40 sections. When compared to traditional radiotherapy it has less or no side effects. Adult deaths due to cancer in the world are 7.6 million (around 13 percent of all deaths) in 2008. the study of 2012 shows that the cancer killed 556,400 people in India in the year 2010. in India the men suffer from oral cancer more and the cancer mostly seen in women is cervical cancer. These both are the common cancers from which many people are suffering.
The Radio Oncologist Mr.Sapna Nangia at indraprastha ApolloHospital said, Apollo Chennai was the first to carry out a Cyberknife surgery in the country. S.Hukku chairman of the Roentgen BLK Radiation Oncology center in BLK hospital said 50 patients had been treated using this technology with out any complications. When coming to the cost, this technique is not very expensive. It cost Rs 5 lakhs. Till now it not adopted to government hospitals. When the government adopts it then it will cost Rs 1 lakh. Doctors are saying that many of common cancers can reduce by avoiding tobacco. The incurable cancers can be cured using this new technology when identified in the early stages.
Bend water with static electricity
you will need
A dry plastic comb
An indoor faucet
A head full of clean dry hair.
what to do
1.Turn on the faucet and slowly turn down the water until you have a VERY thin stream of water flowing.
2. Take the plastic comb and brush it through your hair ten times.
3. Now slowly bring the comb close the the flowing water, (without actually touching the water) If all goes well, the stream of water should bend towards the comb! Magic you ask? Not really.
How does it work
When you brushed that comb through your hair, tiny parts of the atoms in your hair, called ELECTRONS, collected on the comb. These electrons have a NEGATIVE charge. Remember that, its important. Now that the comb has a negative charge, it is attracted to things that have a POSITIVE charge. It is similar to the way some magnets are attracted to certain metals.
When you bring the negatively charged comb near the faucet it is attracted to the POSITIVE force of the water. The attraction is strong enough to actually pull the water towards the comb as it is flowing! If you want to try another experiment with your comb, tear up pieces of tissue until they are as a small as you can get them...I mean really small! Then charge your comb again by brushing it through your hair, and bring it close to the tiny pieces of tissue. If the pieces are small enough they will jump off the table to the comb the same way that the water was pulled to the comb.It is all thanks to the wonders of static electricity.
Thursday, 7 February 2013
How to Use a Peltier module to create free electricity from heat
A Peltier module allows you to turn heat into electricity. Because you can place it in areas that are normally warm anyway, the electricity created is "free" in a sense, though it does work best when one side of the module is cold and the other is hot. In other words, all you'll need for this project is the Peltier module and a cooler surface such as soil or water, and a warm area such as a well lit window or warm pan.
How to Make charcoal (carbon) by the dehydration of sugar
HOW TO:
HOW TO:
1. Add few grams of sugar to the beaker.
2. pour about the same volume of concentrated sulfuric acid to the beaker.
3. stirrer the beaker then stay away and wait.
4. Huge volume of pure charcol is then produced.
CHEMISTRY OF IT:
It is very common reaction which demonstrates the dehydrating and oxidizing properties of conc. Sulfuric acid. Sugar is first dehydrated to elemental Carbon and steam, Carbon is further oxidized to Carbon dioxide, sulfur dioxide also produced by reduction of SO4 2-.
How to Make a Sugar Snake with Sulfuric Acid and Sugar
Sugar (a carbohydrate) is dehydrated with concentrated sulfuric acid. Since a carbohydrate was once considered just hydrated carbon, if you remove the water, carbon would be left over. The acid rips the water out of the sugar and the heat generated by this reaction causes the water to turn to steam. A black mass of carbon is produced.
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