Answer to Question 1
The purpose of a database is to keep track of things. Lists of data involving a single theme can be stored in a spreadsheet; while lists that involve data with multiple themes require a database. Thus, the purpose of a database is to keep track of things that involve more than one theme.
Answer to Question 2
When a business participates in a social network or opens its site to a user-generated content (UGC), it opens itself to misguided people who post junk unrelated to the site's purpose. Crackpots may also use the network or UGC site as a way of expressing passionately held views about unrelated topics, such as UFOs, government cover-ups, fantastic conspiracy theories, and so forth. As of the possibility of such content, organizations should regularly monitor the site and remove objectionable material immediately. Unfavorable reviews are another risk. Research indicates that customers are sophisticated enough to know that few, if any, products are perfect. Most customers want to know the disadvantages of a product before purchasing it so they can determine if those disadvantages are important for their application. Mutinous movements are an extension of bad reviews.
Does everything in nature have a unique purpose (entelechy)?
Apply light tapotement on the head. Tapping lightly with the fingertips works well for this purpose.
Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ...
If CP for an ideal gas is 35.4 J/molK, which of the following is CV for this gas?
A gene map for chromosome 12 from the NCBI database Map Viewer
For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately