the three radioactive emissions alpha, beta and gamma.

Jun 16th, 2015
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Objectives: 1. To determine the penetrating power and the range in air of the three radioactive emissions alpha, beta and gamma.Materials: • Gm Tube, • Clamp Stand, • The Counter Thing, • Ruler, • Set-Square Procedure: • We started the experiment by making sure the radioactive source was aligned with a ruler to the GM tube as accurately as

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FORENSIC PHYSICS1. FALLING FATALITIESOver the last few years I have been asked by the NSW coroner and by the NSW police to provide reports on a number of falling fatalities, specifically regarding the physics of the fall. There are not many lawyers or police or journalists who understand Newton's laws in sufficient detail to even know where to start. Furthermore, there is very little information available in the forensic literature or on web sites concerning fatal falls. Consequently, I have provided some information below, based on cases I have already investigated. If a person dies as a result of a fall from a height, say off a cliff or a tall building, then it is often very difficult to determine whether the fall resulted from an accident or whether it was a suicide or homicide, especially if there were no witnesses and no suicide note or any other indications of a potential suicide. Psychologists assert that there are many indicators of suicide such as previous suicide attempts, depression, a history of mental disorder, a patient in a psychiatric hospital, the leaving of possessions at a cliff top, etc. None of these factors can be taken as proof of suicide, but together

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