The most widely used drug in the Western world is _____   _______.

An offender’s pattern of operation is known as the _______  _______.

The speed at which explosives decompose varies from one to another and permits their classification as _____ and ____.  What are the classifications and give an example of explosives that fall under each classification.

The types of computer evidence can be grouped under two major subheadings.  

The _____ method is used at a crime scene to determine the area of origin.

You have been asked to determine whether a handwritten will, supposedly prepared 30 years ago, is authentic or a modern forgery.  What aspects of the document would you examine to make this determination?  Explain how you would use thin-layer chromatography to help you come to your conclusion.

The development of _____________ dependence on a drug is shown by withdrawal symptoms such as convulsions, when the user stops taking the drug.

Firearms can be divided into two categories: and

The black silver sulfide discoloration of silverware can be removed by heating the silver article in a sodium carbonate solution in an aluminum pan. a. Write down the two half-reactions for this cell. (4 marks)Anode:Cathode: b. What is the cell potential, E°{“version”:”1.1″,”math”:”E°”}? (2 marks) c. If the standard reduction potential for Al3+ is -1.66 V, calculate the reduction potential for the half-cell reaction (2 marks) Ag2S(s) + 2e- → 2Ag(s) + S2-(aq){“version”:”1.1″,”math”:”Ag2S(s) + 2e- → 2Ag(s) + S2-(aq)”} d. Why is a sodium carbonate solution needed? Would a sodium chloride solution work just as well? (2 marks)

Why do the two forms of hemoglobin have different colors?