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.
Best time to book domestic flights. 13 weeks seems to be the magic number when it comes to travelling interstate. For starters, the best time to get in on Melbourne to Sydney flights (one of the worldâs busiest airline routes) is 13 weeks before departure. Perth locals keen to visit the culture capital of Australia also will find the cheapest flights to Melbourne 13 weeks beforehand. A trip to Queensland though, is less impromptu.