Concrete block smashed on lecturer's chest with sledge hammer.
The lecturer (or someone else) lies on a bed-of-nails without discomfort, thus demonstrating the concept of pressure, which is the force per unit area. For added drama the person...
This is a concept question relating to Pascal's cask-bursting experiment. Imagine the experiment inverted—literally! Attach a 20-ft length of tubing to the opening of a can full of water. Turn the can upside down and raise it high. Will the...
Drum evacuated by vacuum pump; crushed by atmospheric bombardment.
With an air pressure of 105 Nm-2 at sea level, even a heavy duty oil drum will be crushed if it has nothing inside to balance the pressure.
The screw cap on the...
Sound pressure level of a fire bell decreases by 6dB when distance is doubled.
The intensity of sound waves emanating from a point source changes inversely as the square of the distance from the source (for an example using visible light...
With an air pressure of 105 Nm-2 at sea level, even a heavy duty oil drum will be crushed if it has nothing inside to balance the pressure.
Video of our demo in action https://youtu.be/VOSgHIklv6w
The screw cap on the drum is...
An empty aluminum soft drink can, placed inside a coil of wire, is made to implode when a capacitor is discharged through the coil.
A dramatic demonstration of Faraday induction and of the repulsion of oppositely directed electric currents...
For an electron to make a transition from one energy level to a higher one, it needs to absorb a photon who's energy is equal to the difference in the energy levels involved. When jumping back down, it will emit a photon of that same energy...
In explaining the electron orbits in the Bohr atom, de Broglie's principle of particle wave duality allows you to treat the electrons as waves of wavelength nλ = 2πr where r is the radius of the orbit. Then the only orbits allowed are those...
The bulk modulus of water is about 2.2 x 109 Pa, which means that a change of 1 N/m2 of external pressure on the liquid is able to change a given volume of it by a factor of 4.5 x 10-10 (for comparison, the same pressure change would produce...
