CONCEPT SCHOOLS

21

ScScandium

5

IIodine

7

NNitrogen

58

Ce

Cerium

e-

Dincer Coach

dcoach@conceptschools.org

www.science.conceptschools.org

www.consef.org

DEPARTMENT

Fun-Fly-Stick

 The amazing Fun Fly Stick can really make objects float in the air.

How?

Fun-Fly-Stick

A positive static charge gets accumulated on the cardboard control tube.

The special precut shapes (flying toys or flyers) are able to receive the static charge off the wand on contact.

The charge gets distributed along the entire surface of the flyer and due to the repulsion of the like charges the flyer expands within itself.

The flyer also repels from the wand, so by moving the wand below the flyer, you can keep it floating in the air.

Electrostatic Drummer

The wand causes one plate to be positively-charged; the other plate is grounded by your finger and will be neutral.

The bead is attracted to the positive plate, gains a positive charge, and then is repelled to the opposite plate.

Touching the opposite plate, the plate is grounded immediately and becomes neutral.

Once neutral, the process repeats at a very fast rate and creates the ringing bell sound.

Film Canister

Launch flying film canisters using acid-base reactions and air pressure

NaHCO3(s) + H(aq)         Na+(aq) + CO2(g) + H2O(l) 

CO2 builds up in a closed film canister

Impossible Bottle

How hard would it be to inflate a balloon in a plastic soda bottle? 

IMPOSSIBLE BOTTLE

Just put the balloon inside the plastic bottle and puff away.!

Can you inflate the balloon?What can’t you?

IMPOSSIBLE BOTTLE

According to the PV=nRT rule, inflating the balloon inside the bottle means adding up more air molecules (n) that may increase the volume of the bottle or the pressure of the air molecules inside the bottle.

Unless you can’t increase the volume of the bottle or the air pressure inside the bottle, you can’t inflate the balloon.

However, when you remove the stopper, the air molecules in the bottle have an escape, so that the pressure and the volume do not change inside the bottle.

IMPOSSIBLE BOTTLE

Lenz LawHow does the metal inside the tube overcome gravity?

Lenz Law

When the field lines of magnetic block approach the conductor (in this case, the tube), a resulting electromagnetic force and current are generated within the tube.

The electric current in the tube creates magnetic force in the opposite direction of the moving magnet resulting in a repelling force.

Eating Nails for Breakfast

Do we really eat iron nails in the breakfast?

There are two forms of dietary iron: heme and nonheme. Heme is found in animal foods that originally contained hemoglobin, such as red meats, fish, and chicken. Your body absorbs the most iron from heme sources.

Iron in plant foods such as lentils, beans, and spinach is nonheme iron. This is the form of iron added to iron-enriched and iron-fortified foods. Most dietary iron is nonheme iron.

When you eat food with iron, iron is absorbed into your body mainly through the upper part of your small intestine.

Iron provided by dietary supplements is often found as iron(II) fumarate.

Eating Nails for Breakfast

Collect the iron particle in cereals with a magnet.

Cartesian Diver

Discover the relationship between air pressure and density, and how to make a floating diver more or less buoyant.

Float or sink? It's your choice!

Cartesian Diver

Squeezing the bottle causes the diver to sink because the increased pressure forces water up into the diver, compressing the air at the top of the pipette.

This increases the mass of the diver causing it to sink. Releasing the squeeze decreases the pressure on the air at the top of the pipette, and the water is forced back out of the diver.

Newton’s Beads

 Simply give one end of the beads a tug and watch as they cascade over the side of the container.

What is the science behind it?

Newton’s Beads

The science behind the fountain of beads centers around the principle of inertia.

The initial “tug” that you gave to start the beads flowing was all that was needed to help turn the potential (stored) energy into kinetic energy (the energy of motion).

As the speed of the flowing beads increased, you probably noticed that the string of beads actually lifted above the rim of the container due to the inertia of the fast-moving beads.

The beads continue moving in the same direction (initially upward) until a force acts upon it (the arcing motion of the beads is caused by the downward force of gravity.)

https://www.youtube.com/watch?v=6ukMId5fIi0#t=102

Bounce and No Bounce balls

Try to bounce the ball.Can you?

Bounce and No Bounce balls

The Bounce Ball is made of a rubber that has spaces in between its molecules.

When the Bounce Ball hits the floor, the molecules compress and rapidly decompress creating a spring reaction.

The No Bounce Ball is made of a rubber with smaller or nonexistent spaces between its molecules.

That means when the No Bounce Ball hits the floor it will compress very little or not at all.

Bouncing Bubble

Bubbles burst when they come in contact with just about anything.

A bubble’s worst enemies are oil and dirt.

A “super” bubble will bounce off of a surface if it is free of oil or dirt particles that would normally break down the soap film.

Magic Refilling Bottle

Try to pour out all of the water at once.

Magic Refilling Bottle

When you cover the hole in the bottle with your finger, you are blocking air from getting into the bottle and pushing on the water. The air pressure pushes in, through the PVC, but only enough to keep water from rushing into the pipe.

Once you remove your finger from the hole, air is allowed into the rest of the bottle.

This increases the amount of air pressure pushing on the water’s surface, equaling the air pressure pushing through the PVC.

With the equalized air pressure, the water level inside and outside the PVC are also equal.

Replacing your finger locks the water level in place, and you pour the refilled PVC out into container.

Friction…Stick a rope inside the bottle and watch as it holds it.

Why?

Friction…

Stick a rope inside and watch as it holds the root beer bottle.

Friction makes this effect work.

The surface of the ball provide adequate force of resistance to bind the rope against the glass and keeps the rope slipping out of bottle.

Atmospheric Mat

Try to pull the mat from a surface.

Why can’t you?

Atmospheric Mat

A great way to show that suction cups stay stuck because of the pushing force of air, not from a pulling "suction" force.

The mat is held down by atmospheric pressure, which is approximately 15 pounds per square inch.

A quick calculation leads to a total pressure of over 1500 lbs on the mat (assuming no air at all is under the mat).

Now, you probably don’t have to pull with 1500 lbs of force to lift the mat.

Sound Pipe What makes the Sound Pipe produce sounds?

Sound Pipe

The answer is a combination of resonance and Bernoulli's principle.

When you twirl the Sound Pipe, the outer end is moving faster than the end in your hand. Bernoulli's principle states that the faster a fluid (like air) moves across a surface the lower the pressure on the surface will be.

This explains the reduced pressure at the outer opening of the tube. With higher pressure occurring at the end of the tube held in your hand, the pressure differential results in air rushing up the tube.

The faster you twirl the Sound Pipe, the greater the pressure differential, increasing the speed of air moving up the tube.

Sound Pipe

Sound waves traveling out the open ends of the tube partially reflect back into the tube.

Waves of many different wavelengths are produced, but only waves whose wavelengths fit the length of the tube (or a whole number of half wavelengths) will be reinforced by the reflected waves.

The lowest frequency for which the waves resonate is called the fundamental.

Poly Density Bottle

Why don’t blue and white beads mix?

Poly Density Bottle

Water and isopropanol alcohol are soluble in all proportions.

Both water and alcohol have OH groups that easily bond to each other.

However Na and Cl ions bind with water molecules forcing the alcohol molecules out of the water solution.

This causes two layers to form: alcohol on top and the more dense salt water on the bottom.

Alcohol and saltwater are immiscible and do not mix.

From lowest to highest density the order is: isopropanol alcohol, white beads, blue beads, and salt water.

Magnetic Lines