Define the following as they relate to website privacy issues and data security: PII, encryption, SSL, and cookies.
What will be an ideal response?
Many websites, especially e-commerce websites, collect sensitivepersonally identifiable information (PII), such as Social Security numbers, credit card numbers, names, addresses, and telephone numbers.?To provide security for transmission of personal or confidential information, such as credit card transactions, e-commerce websites use encryption, which prevents unauthorized recipients from reading data.Encryptionis a process that encodes data into illegible content. To restore the usability of encrypted data, users applydecryptiontechniques, which remove the encryption and return data to its original format.?TheSecure Sockets Layer (SSL)protocol safeguards and encrypts confidential information as it travels over the Internet. Webpages with thehttps://protocol designation instead ofhttp://in their URL use SSL to transmit customers' data.?Websites often use tracking tools to customize a website visitor's session, or to collect a user's personal information. Most often, the tracking occurs without the user's permission or knowledge. When used positively, web tracking tools can make it more convenient for visitors to return to their favorite websites by storing their login data or webpage customization preferences. Web tracking tools also can collect information about a user, such as personal information or website visits, and report that information back to the website owner or to a third party. A common web tracking method is the use ofcookies, which are small text files stored on a visitor's hard drive.
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Jupiter is a failed star
Indicate whether the statement is true or false
Will the Sun become a brown dwarf? Explain
What will be an ideal response?
When the reflection of an object is seen in a plane mirror, the image is:
a. real and upright. c. real and inverted. b. virtual and upright. d. virtual and inverted.
An automotive catalytic convertor is a packed bed in which a platinum catalyst is coated on the surface of small alumina spheres. A metal container holds the catalyst pellets and allows engine exhaust gases to flow through the bed of pellets. The catalyst must be heated by the exhaust gases to 300°C before the catalyst helps combust unburned hydrocarbons in the gases. The time required to achieve this temperature is critical because unburned hydrocarbons emitted by the vehicle during a cold start comprise a large fraction of the total emissions from the vehicle during an emission test. A fixed volume of catalyst is required but the shape of the bed can be modified to increase the heat-up rate. Compare the heat-up time for a bed 5-cm-diameter and 20-cm-long with one 10 cm diameter and
5-cm-long. The catalyst pellets are spherical, 5-mm-diameter, have a density of 2 g/cm3, thermal conductivity of 12 W/(m K) and specific heat of 1100 J/(kg K). The packed-bed void fraction is 0.5. Exhaust gas from the engine is at a temperature of 400°C, a flow rate of 6.4 gm/s, and has the properties of air.
GIVEN
FIND
The heat-up time (t) for the pellet surface temperature (Tp) to reach 300°C
ASSUMPTIONS
The initial temperature of the bed (To) = 20°C
SKETCH
