Anemometer use is constructed from a ping-pong ball attached to a string. When the wind blows horizontally, it presses on and moves the ball; because ping-pong balls are very lightweight, they move easily in light winds. Measuring the angle between the string-ball apparatus and the vertical gives an estimate of the wind speed. This type of anemometer is mostly used for middle-school level instruction, which most students make on their own, but a similar device was also flown on Phoenix Mars Lander. The first designs of anemometers that measure the pressure were divided into plate and tube classes. These are the
Angelo (Measure for Measure) the relationship between justice and mercy. There is much debate about what Shakespeare intended this character to portray. Critics disagree about whether Angelo is a good man who has fallen because of power and sexual temptation or a malicious man from the start. Regardless, he is the personification of justice in the play. When juxtaposed against Isabella (mercy), Angelo represents adherence to the law and punishment for sin, though he does not always adhere to the strict justice he enforces. Once Angelo meets Isabella he is forced to consider himself in a different light and acknowledge his shortcomings. "Measure for