1. Body Fat
This device measure your percentage of body fat but what is it actualy measuring?
Why do you have to enter your height?
2. Electric motor
How does this motor work without a commutator?
3. Simplest Electric motor
Can you explain how this motor works?
4. Making energy 1
This device creates a higher PD but is it making energy?
5. Making energy 2
Can this be true?
6. Levitating train
What holds the train up?
What propels the train?
What stops the train falling of the track?
5. Magnet Gun
Does the end ball fly off faster than the first ball hits the magnet?
Is momentum conserved?
Sunday, April 12, 2009
Thermal Physics
1. Helium Balloon
Why does the balloon shrink?
Why does the balloon fall to the ground?
2. Balloons in a car
Why do the helium balloons go forwards when the car brakes?
3. Drinking liquid Nitrogen
What would happen if he swallowed the liquid?
Don't try this ever ever ever.
4. Brownian Motion
Why was this such important evidence for the particle nature of matter?
Why does the balloon shrink?
Why does the balloon fall to the ground?
2. Balloons in a car
Why do the helium balloons go forwards when the car brakes?
3. Drinking liquid Nitrogen
What would happen if he swallowed the liquid?
Don't try this ever ever ever.
4. Brownian Motion
Why was this such important evidence for the particle nature of matter?
Waves
1. Mexican Wave
Is this a wave?
Would it diffract and interfere?
2. Japanese Wave
Why do the people at the far end of the pool not have so much fun?
Would this wave diffract?
3. Big Wave
Why do they need to be towed by a jet ski to catch this wave?
It looks like the water is going up the wave, is it?
4. Small wave
Can you see this wave reflecting, refracting, difrracting and interfering?
5. Shaking Bridge
Why does the bridge shake so much?
6. Breaking a Glass
Is this just a matter of singing loudly or does the frequency have to be right?
7. Sonic boom
Why is there a cone behind the plane?
Why is there a bang when the plane goes at the speed of sound?
8. Rubens Tube
What is the approximate wavelength of the sound at 1 min?
9. Shake Test
What this has got to do with resonance?
10. Annies Song
How do these singers sing so high?
Is this a wave?
Would it diffract and interfere?
2. Japanese Wave
Why do the people at the far end of the pool not have so much fun?
Would this wave diffract?
3. Big Wave
Why do they need to be towed by a jet ski to catch this wave?
It looks like the water is going up the wave, is it?
4. Small wave
Can you see this wave reflecting, refracting, difrracting and interfering?
5. Shaking Bridge
Why does the bridge shake so much?
6. Breaking a Glass
Is this just a matter of singing loudly or does the frequency have to be right?
7. Sonic boom
Why is there a cone behind the plane?
Why is there a bang when the plane goes at the speed of sound?
8. Rubens Tube
What is the approximate wavelength of the sound at 1 min?
9. Shake Test
What this has got to do with resonance?
10. Annies Song
How do these singers sing so high?
Mechanics
1.Running up a wall
How does he get enough friction to run up the wall?
Can he keep running up the wall?
2. Running along a wall
What is the trajectory of the runner?
Before take off did the runner run parallel to the wall or at an angle to the wall?
3. Running round a corner
Another wall run. At the end of thevideo he runs around a corner why is it possible to run further if there is a corner?
4. Wall of death
What force stops the bikes and cars from falling down?
Why can't the bike be horizontal?
The car is heavier than the bike but why does it only have to go at the same speed?
5. Looping the loop
How does Bob manage to get higher and higher? Where is the energy coming from?
What force holds him in a circle around the top of the loop?
Write an equation for the minimum speed required, does it depend on the mass of the skater?
6. Not looping the loop
Why did this skater not make it?
What was his trajectory once he left the pipe?
7.Dead sea swimming
Why can they swim so high in the water?
What would it be like swimming in mercury?
Could you swim in petrol?
9. Speed Skiing
Can a speed skier travel faster then a free falling body?
Can they accelerate faster than free fall?
10 Wing Suits
They travel pretty fast but why is their speed less than without the wingsuit?
Is it possible for the fliers to go across without going down?
11. Hill climb
Its not easy to see but why are these bikes longer than normal motor bikes?
Why isn't it possible to ride up a vertical wall?
12. Half Pipe
How do they manage to get higher and higher each jump? whare is the energy coming from?
13. Perpetual Motion
Can this toy keep moving for ever?
Could it be used to generate electricity?
How does he get enough friction to run up the wall?
Can he keep running up the wall?
2. Running along a wall
What is the trajectory of the runner?
Before take off did the runner run parallel to the wall or at an angle to the wall?
3. Running round a corner
Another wall run. At the end of thevideo he runs around a corner why is it possible to run further if there is a corner?
4. Wall of death
What force stops the bikes and cars from falling down?
Why can't the bike be horizontal?
The car is heavier than the bike but why does it only have to go at the same speed?
5. Looping the loop
How does Bob manage to get higher and higher? Where is the energy coming from?
What force holds him in a circle around the top of the loop?
Write an equation for the minimum speed required, does it depend on the mass of the skater?
6. Not looping the loop
Why did this skater not make it?
What was his trajectory once he left the pipe?
7.Dead sea swimming
Why can they swim so high in the water?
What would it be like swimming in mercury?
Could you swim in petrol?
9. Speed Skiing
Can a speed skier travel faster then a free falling body?
Can they accelerate faster than free fall?
10 Wing Suits
They travel pretty fast but why is their speed less than without the wingsuit?
Is it possible for the fliers to go across without going down?
11. Hill climb
Its not easy to see but why are these bikes longer than normal motor bikes?
Why isn't it possible to ride up a vertical wall?
12. Half Pipe
How do they manage to get higher and higher each jump? whare is the energy coming from?
13. Perpetual Motion
Can this toy keep moving for ever?
Could it be used to generate electricity?
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