Exploring Mathematics Chapters 12-14 Flashcards
invented tabulating machines used in the 1890 census
Herman Hollerith
In this list, which one is considered the “heart” of a computer: input, control program, memory, central processing unit, output?
central processing unit
A computer with components put farther apart will run more slowly because
electric signals can go no faster than the speed of light
The expression log103 = 0.477 is read as “The logarithm of the number __________ in base __________ is __________.”
three, ten, 0.477
invented logarithms
John Napier
In 1861, James Clerk Maxwell made a color photograph using
the three colors of red, green, and blue
Any number raised to the zero power, is
1
built a calculator called the Step Reckoner
Gottfried Leibnitz
The Constitution of the United States has 4,609 words and 26,747 characters. At the rate of 7,000 bytes per second, how long would it take a computer to download the Constitution of the United States as an uncompressed text file?
About 3.8 seconds: 26,747 characters / 7,000 bytes (characters) per second = 3.821 seconds
wrote the first computer program
August Ada Byron, Lady Lovelace
In the early days of computers, input was mainly by 12
punched cards
built the difference engine
Charles Babbage
Video images can be compressed by
transmitting only those pixels that are different from the previous one
built the first general purpose calculating machine
Howard H. Aiken
The number 5,280 changed to standard notation is
5.28 x 103
Moore’s law states that computers double in power every 18
months
built a calculator to help his father, a tax collector
Blaise Pascal
Base 10 uses the digits 0 through
9
spent six years calculating the orbit of Mars
Johannes Kepler
In computer usage, a single position for a binary digit is called
bit
In personal computers, a byte of data is made of how many bits?
8
the letters RAM stand for
random access memory
