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Answers
e) Electricity
d) The first generation computers used the Vacuum tubes for their operation which used to occupy large area of a room and most of the operation performed were completely mechanical in these computers.
c) Line graphs can also be used to compare changes over the same period of time for more than one group. Pie charts are best to use when you are trying to compare parts of a whole. They do not show changes over time. Bar graphs are used to compare things between different groups or to track changes over time.
b) Here are five tips for developing effective content for your presentation:
Know your audience. ...
Tell audience members up front why they should care and what's in it for them. ...
Tell your story. ...
Keep it simple. ...
Set the stage. ...
Get ready to perform.
a) ROM