Maxwell Wheel (+3 to your average)
This suspended wheel
continuously winds and
unwinds up and down a
string. It demonstrates the
principle of potential and
kinetic energy. The wheel
gradually loses height
each time it winds back up
the string, due to friction
losses, so energy is not
conserved.
Pascal's Law (Equilibrium) Tubes
Our solid base holds 4 differentshaped tubes that show that liquid
levels are independent of the
shape of the containing vessel.
Magdeburg Hemispheres (+3 to your average)
Our
plastic
half-spheres
withstand 180 pounds of force
when pumped free of air. Pass
them around the classroom,
inviting students to try to pull
them apart using safety
handles, or place in the
Vacuum jar and remove the air
to equalize the pressure and
watch the halves separate.
Bell In Vacuum w/Plate & Bell
Nature, of course, abhors a
vacuum - and sound waves won't
travel through one. Prove it with a
ringing bell inside a sealed glass jar.
As air is gradually pumped out of
the jar, the bell becomes faint,
then dies.
Optics Box and modeling Human Eye (+5 to your average)
Study reflection, prisms, parallel and convergent rays and more
ONLY lenses and prisms will be provided by Physics teacher
Total Internal Reflection (+3 to your average)
ONLY transparent rectangualar blocks will be
provided by Physics teacher. Laser Ray box can
be built by teacher’s help.
Show some of the more curious aspects of
optics. How? By focusing on its effects in water.
Light only moves at 75% its vacuum speed in
water, which causes a ray to bend at the
air/water interface, a phenomenon know as
refraction. If the angle is steep, the ray will
reflect off this interface instead. We use a low
power laser beam and a circular tank filled with
water to demonstrate refraction and reflection.
As the tight, bright beam bends, its angle can
be read on the scale printed around the tank.
The laser is permanently fixed to the tank and
can be pointed at any angle. Should you wish,
you can fill the tank with mineral oil or other
liquids to vary the effect.
Van de Graaff Generator
The classic Van de Graff
Generator device demonstrates
some of the fundamental concepts
in
electrostatics:
charge
accumulation,
potential
differences,
capacitance,
and
resistivity.
The
Generator's
conductor sphere is detachable,
the drive motor has controllable
speed, and the device includes a
small discharge sphere on a rod.
Radiometer
Convert light into motion
and demonstrate radiant
heat. This device has a
rotating shaft supporting
two vanes, mounted in an
evacuated glass bulb. One
side of each vane is black,
the other shiny silver. High
light levels cause the vanes
to turn.
Ball and Ring
This popular demo of metal
expansion and contraction consists
of a brass ball and ring mounted
on steel rods with wooden
handles. At room temperature the
ball passes through the ring; when
heated it will not.
Solar Furnace
Did you know temperatures
can reach more than 150
degrees C in bright sunlight?
Demonstrate this with a
parabolic
reflector.
It
concentrates sunlight in a black
colored copper cup.
You can use a satellite dish and
cover its inner surface with
small cut mirrors.
Static Spinner
Detect an invisible electric
wind from a Van de Graaff
with our static spinner.
since pointed objects carry
a
much
greater
concentration of electric
charges than the Van de
Graaff's sphere, the spinner
will rotate rapidly when in
its vicinity.
Visible Magnetic Field Lines (+3 to average)
Magnetic line is an imaginary tool we use to describe the abstract
concept of magnetic field. In this experiment, we present the 3dimensional and 2-dimensional magnetic lines with simple
apparatus. ONLY permanent magnets will be provided by Physics teacher.
Steady Hands Game and Electric Conductivity (+5 to average)
Buzzwire is a steady hand game that is well known to many as a table top
amusement. Buzz wire is a challenging and competitive game where you are
playing the number of touches against time. The player has to get the right balance
between speed and skill in order to obtain the winning score.
ONLY Buzzer, Batteries, Thick Wire
and Lamp will be provided by
Physics teacher. Design idea and
construction is up to student.
Design Options: You will decide about the design of your buzz
wire maze and the stand or frame. You will also decide about the
start point and end point of your maze.
This apparatus demonstrates conservation of
momentum and energy in an interesting way.
When you pull aside a particular number of balls
from one end and then release them, they fall
back to their original position, and in colliding
with the remaining (stationary) balls, transfer
their momentum to them such that an equal
number of balls emerges from the opposite side
with the same velocity the first set of balls had
upon collision, and rises to the same height to
which the first set of balls was raised. This second
set of balls then falls back to its original position,
transferring momentum back to the first set of
balls. These then fly away from the rest and rise to
the height from which they were originally
released. The cycle continues until losses from
friction, and from the fact that the collisions
between balls are not perfectly elastic, damp the
motion. (The balls do not quite make it to exactly
the same height each time; some of the kinetic
energy is converted to heat.) If you release any
number of balls, the same number will always fly
away from the opposite side, independent of how
high you raise them before you release them.
Newton’s Cradle (+5)
Balance Project – Find the Mass of Wooden Block (+5)
ONLY equal arms balance stand will be provided by Physics teacher.
50cm
10
9
8
7
6
50cm
5
4
3
2
1
1
2
3
4
5
6
7
10g X 25cm=250 g.cm
50g X 15cm=750 g.cm
8
9
10
10g X 50cm=500 g.cm
750 g.cm
Some Instructions:
•
•
•
10g
20g
50g
Unknown mass
The balance stick must be homogenous
Each side hooks have 5cm distance
between
Students should try to estimate the
balance conditions by calculation and
then try it practically.
DNA Model (+5 to average)
Educational game for children. DNA
Activity Model. Easy-to-understand
replica of the "molecule of life".
Construct double helix model to
complete with cytosine, adenine,
guanine and thymine nucleic acid
bases; connecting phosphate strands;
and a centre rod representing
hydrogen bonds. Easy-to-assemble,
three-dimensional model is made of
durable plastic components.
Design and used material is up to student.
Bed of Nails and Balloon – Pressure Experiment (+3 to average)
When you place the balloon on the bed of nails, the pressure points
are spread all across the surface of the balloon.
Design and used material is up to student.
Build Your Own Light Bulb (+3 to average)
This experiment is about how to make a pencil lead light
that can also be used as a light bulb.
ONLY power supply and crocodile clip cables will be provided
by Physics teacher.
Crashing Cane
Air Pressure
When a can filled with hot water is closed and
is cooled down rapidly by pouring cold water
on it, it will crash instantly.
Explanation:
When the air inside the can is cooled, its
pressure decreases. The high atmospheric
pressure outside exerts a great force on the
can and causes it crashes.
The cardboard does not fall and
the water remains in the glass
even though it’s not supported
by anything.
Explanation:
The force caused by the
atmospheric pressure acts on
the surface of the cardboard is
greater than the weight of the
water in the glass.
Optical Fiber – Total Internal Reflection (+3 to average)
Total Internal Reflection
Total internal reflection is the reflection
of light at the boundary of 2 medium
where the angle if incident exceeds the
critical angle of the medium.
An optical fibre is a long thin strand
of glass surrounded by glass
cladding with low refractive index.
Rays of light entering one end of the
fibre experience repeated total
internal reflection until they emerge
at the other end.
ONLY power supply, Laser Diode, Fiber Optic Cable, and crocodile clip cables will be
provided by Physics teacher. Construction materials belongs to student.
Ping Pong Ball in an Electric Field (+3 to average)
ONLY power supply, will be provided by Physics Teacher.
The ball will still remain stationary. This is because the
force exert on the ball by the positive plate is equal to the
force exerted on it by the negative plate.
If the ping pong ball is displaced to the right to touch the
positive plate, it will then be charged with positive charge
and will be pushed towards the negative plate.
When the ping pong ball touches the negative plate, it will be
charged with negative charge and will be pushed towards the
positive plate. This process repeats again and again, causes
the ping pong ball oscillates to and fro continuously between
the two plates.
Electric Bell – Electromagnetism (+3 to average)
ONLY power supply, will be provided by Physics Teacher.
When the switch is on, the circuit is completed and current flows. The
electromagnet becomes magnetized and hence attracts the soft-iron
armature and at the same time pull the hammer to strike the gong.
As soon as the hammer moves towards
the gong, the circuit is broken. The
current
stops
flowing
and
the electromagnet loses its magnetism.
This causes the spring to pull back the
armature
and
reconnect
the
circuit again.
When the circuit is connected, the
electromagnet regain its magnetism and
pull the armature and hence the
hammer to strike the gong again. This
cycle repeats and the bell rings
continuously.
Periscope (+3 to average)
Periscopes, including this one, can help you see around
barriers. But what if you want to see something behind
you? Submarine periscope operators walk in circles,
turning the whole periscope. Why not just rotate the
top mirror? Try it with this rotating periscope, and
you'll see that the image of everything behind you is
upside-down! An elegant demonstration of basic plane
mirror reflection, this is also a great way to test student
understanding of image formation
High Voltage Ignition Coil Experiments
500W dimmer
Mains Input
220VAC 50Hz
Neutral
440VAC 3.5µF
Spark Gap
Plasma Ball Experiments
Blind Spot of Human Eye (+3 to average)
The spot where your optic nerve connects to your retina is called the
optic disc. There are no photoreceptor cells on this disc, so when an
image hits that part of your retina, you can't see it. This is your blind
spot. You don't notice this blind spot in every-day life, because your
two eyes work together to cover it up.
The brain doesn't just match colored backgrounds. It can also make other changes to what you see. Try drawing
two filled-in rectangles side by side with a circle in between them. A few inches to the right of this, draw a square.
Close your right eye and focus your left eye on the square. Move the paper until the circle disappears and the two
separated bars become one bar. How did that happen? The circle in between the bars fell on your blind
spot. When it disappeared, the brain filled in for the missing information by connecting the two bars!
Here is one final experiment with your blind spot. In this instance the brain
doesn't match the blind spot with its immediate white background, but
instead with the pattern surrounding it. Draw a line down the center of your
page. On one side draw a small square and on the other draw rows of
circles. Color the center circle red and all the others blue:
Close your left eye and look at the square with your right eye. As you move
the paper, the red circle should disappear and be replaced by a blue one!
Students should prepare different designs for the same experiment result.
Visitors will be allow to take away prepared examples of blind spot papers.
DRY ICE Experiments (+5 to average)
Students should arrange the big size aquarium and also buy Dry ice.
Dry ice is so called because it does not
melt into liquid carbon dioxide before
turning into gas. The process of a liquid
changing state into gas is called
evaporation. When a solid changes directly
into gas, the process is called sublimation
(the solid sublimes). Carbon dioxide be
liquefied under higher than atmospheric
pressures, but the concentration of the gas
in air prevents the liquid from forming
naturally on Earth.
Carbon dioxide is more dense than, and descends in normal air. Because the air filled
bubbles are less dense, they float on the invisible layer of carbon dioxide in the aquarium.
Helium filled balloons float in air for exactly the same reason, except that helium is less
dense than air. Any substance (or object) will float when immersed in a fluid (ie gas or
liquid) if the substance (or object) is less dense than the fluid.