There are several factors that can influence sonic booms -- weight, size, and shape of the aircraft or vehicle, plus its altitude, attitude and flight path, and weather or atmospheric conditions.

有几个因素可以影响音爆——飞行器的重量，大小，形状以及其飞行高度，姿势和路线，还有天气或大气状况。

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WHEN an airliner takes off for a transatlantic flight it needs to carry some 80 tonnes of fuel, which accounts for around one-fifth of its weight.

一架飞越大西洋的飞机大约需要携带80公吨的燃料，这约占飞机重量的五分之一。

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During flight, it can lift carrion up to 16kg - four times its weight.

在搏斗中，它能举起重达16公斤的腐肉——4倍于它的自身体重。

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And one of the biggest gas-guzzling factors is in-flight weight.

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The pound-and-a-half weight of a current iPad sheds the tremendous amount of weight that would normally be needed for a conventional in-flight entertainment system built into the headrest, which on a typical 375-seat 767 could see the iPads pay for themselves within years, if not sooner.

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Fuels savings by reducing weight is significant when you include the two pilot bags (50lbs), Cockpit Manuals (25lbs), and Flight Attendant Manuals ( 4 x 25lbs) that the iPAD will eventually replace. 175 lbs is the weight of a person.

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