Which of these would have the greatest potential energy?
a) a roller coaster at the top of a hill.
b) a roller coaster half-way up the hill.
c) a roller coaster half-way down the hill.
d) a roller coaster at the bottom of the hill.

Are special characters that allow you to search for multiple words at the same time.

Jason works as an accountant in a department store. he needs to keep a daily record of all the invoices issued by the store. which file naming convention would him the most? a)give the file a unique name b)name the file in yymmdd format c)use descriptive name while naming the files d)use capital letters while naming the file

Why were most movies from the late 1890s until the early 1930s only filmed in black and white? there were only a few people who could afford the technology to produce color motion pictures back then. audiences did not want color motion pictures until later. the film used to make color motion pictures often overheated, which was a safety hazard, so it was generally not allowed. color films had to be hand-colored, frame by frame.