The FBIs Carnivore System free essay sample

This paper looks at the FBIs new law-enforcement division called the Carnivore system . There is a new technology of criminal activity which involves the use electronic means of communication in committing crimes. This paper looks in greater depth at some of these issues by examining the FBI Carnivore system, how it was developed, what its capacities are, and the problems civil libertarians and others see. From the paper: `It has a ferocious name. And its bark is in fact probably just about as bad as its bite. And while it certainly has the power to do good, the inherent costs may make it not worthwhile. The FBI?s Carnivore system is a tool used by this law enforcement agency to snare criminals who use electronic means of communication in committing their crimes, allowing this federal agency to collect and examine email and other electronic traffic sent and received by those suspected or accused of crimes ? along, of course, with the rest of us. We will write a custom essay sample on The FBIs Carnivore System or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page While the crime-fighting capacities of such a capability can be seen to be substantial, it should also be clear that such a system has the ability (if improperly used) to cause substantial harm to the rights of the innocent because most people do not realize that their electronic correspondence can be seized and examined. An essential bedrock of the American legal system (and indeed of American culture) rests on the English common-law assumption that people have a basic right to privacy and that unless they should assume or know otherwise that they have a presumption of that privacy. Thus a person shouting on a public street has no reasonable expectation of privacy. A person sitting at her computer sending email to her mother does.`

Examples of Physical Changes and Chemical Changes

Examples of Physical Changes and Chemical Changes Are you confused about the difference between chemical changes and physical changes and how to tell them apart? In a nutshell, a chemical change produces a new substance, while a physical change does not. A material may change shapes or forms while undergoing a physical change, but no chemical reactions occur and no new compounds are produced. Key Takeaways: Chemical and Physical Change Examples A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity.Examples of chemical changes are burning, cooking, rusting, and rotting.Examples of physical changes are boiling, melting, freezing, and shredding.Often, physical changes can be undone, if energy is input. The only way to reverse a chemical change is via another chemical reaction. Examples of Chemical Changes A new compound (product) results from a chemical change as the atoms rearrange themselves to form new chemical bonds. Burning woodSouring milkMixing acid and baseDigesting foodCooking an eggHeating sugar to form caramelBaking a cakeRusting of iron Examples of Physical Changes No new chemical species forms in a physical change. Changing the state of a pure substance between solid, liquid, and gas phases of matter are all physical changes since the identity of the matter does not change. Crumpling a sheet of aluminum foilMelting an ice cubeCasting silver in a moldBreaking a bottleBoiling waterEvaporating alcoholShredding paperSublimation of dry ice into carbon dioxide vapor How to Tell Whether Its a Physical or Chemical Change? Look for an indication that a chemical change occurred. Chemical reactions release or absorb heat or other energy or may produce a gas, odor, color or sound. If you dont see any of these indications, a physical change likely occurred. Be aware a physical change may produce a dramatic change in the appearance of a substance. This doesnt mean a chemical reaction occurred. In some cases, it may be hard to tell whether a chemical or physical change occurred. For example, when you dissolve sugar in water, a physical change occurs. The form of the sugar changes, but it remains the same chemically (sucrose molecules). However, when you dissolve the salt in water the salt dissociates into its ions (from NaCl into Na and Cl-) so a chemical change occurs. In both cases, a white solid dissolves into a clear liquid and in both cases, you can recover the starting material by removing the water, yet the processes are not the same. Learn More 10 Examples of Physical Changes10 Examples of Chemical ChangesChemical and Physical PropertiesUnderstanding Chemical and Physical Changes Source Zumdahl, Steven S. and Zumdahl, Susan A. (2000). Chemistry (5th Ed.). Houghton Mifflin. ISBN 0-395-98583-8.