1 Ã Van de Graaff generator 1 Ã electrically-insulating stool Some confetti, or aluminium foil, or foil cake trays. The demonstration. This demonstration involves high voltages, and so it should never be done by anyone with a pacemaker or other internal electrical device, or who thinks they might be pregnant.
Minimum Advance Purchase. Airlines increase prices dramatically 14 days and 7 days before departure, respectively, according to figures analyzed by FareCompare. To avoid these sharp spikes, you should aim to purchase your ticket a minimum of 15 days prior to departure. Air travel experts at FareCompare say that the window for purchasing tickets at the best price is between three months and 14 days in advance.
the answer is domestic flights are at their cheapest 54 days before takeoff which could save travellers up to Â£ 190 while the worst time to book a cheap flight is last minute with the day before departure the most expensive the next biggest mistake travellers make when looking to book cheap flights is buying them too far in advance according to the findings based on travel throughout the us