As a current passes through the outer coil, as magnetic field is created and due to the large number of windings of the inner coil, a huge step up in voltage occurs. Such a large potential difference is created that bolts of electricity leave the top to connect the high potential difference at the top […]
Every object with nonzero temperature emits radiation. Our bodies emit radiation in the infrared range. Cameras that are sensitive to these wavelengths of light can make out images of people even when there is no other light in the room since it is our bodies themselves that emit the light even if we can’t see […]
Mixing cornstarch and water creates a non-Newtonian fluid, a fluid that changes viscosity under stress. With high stressed, this fluid acts as a solid but returns to a liquid under low or no stress. This allows one to let this fluid slip through your fingers, but also run across a pool of this fluid without […]
The Rubens’ tube is a long, closed tube with propane pumped in and holes drilled along the top for the propane to escape. Igniting the propane along the top gives a “wall” of fire where propane and oxygen are present. Playing a pure tone in the tube will create sinusoidal peaks and valleys in the […]
The leaf blowers are used to create a jet of air. Through Bernoulli’s principle, inside the jet of air where the velocity is at its highest has a low pressure while the outside the stream has low velocity and high pressure. This difference in pressure allows the ball to be suspended by the leaf blower.
In this demo, a high voltage is placed between some wires and a grounded electrode. When an alpha emitter is placed near the wires, sparks start to jump between wires and the electrode. The alphas temporarily ionize some of the air in this region, creating an easier path for electricity to flow!
Scientists shoot high energy particles at an unknown and watch what comes out of the collision in order to determine the composition of the target. In the same way, visitors will be instructed to hit an air hockey puck (probe) into a covered area where some unknown shape has been placed (the nucleus). By judging […]