Body language a conversation, 7% of what is communicated is via what is said, 38% is via tone of voice, and the majority, 55%, is via body language. This is also referred to as the ‘7%-38%-55% Rule’, and is often considered in studies of human communications. Whilst there is a wider debate about the percentage share which should be attributed to each of the three contributing factors, it is generally agreed upon that body language plays a fundamental role in determining the attitude a person conveys. A person may alter their body language in order to alter the attitude they convey; this
Wide-body aircraft wake turbulence is generally related to the weight of an aircraft, these categories are based on one of four weight categories: light, medium, heavy, and super. Due to their weight, all current wide-body aircraft are categorized as "heavy", or in the case of the A380 in U.S. airspace, "super". The wake-turbulence category also is used to guide the separation of aircraft. Super- and heavy-category aircraft require greater separation behind them than those in other categories. In some countries, such as the United States, it is a requirement to suffix the aircraft's call sign with the word "heavy" (or "super") when