In the 19^th century,cost and Time in Long Distance Trade

question 34

Multiple Choice

In the 19^th century,cost and time in long distance trade was made dramatically more profitable by the invention of

• A) the telegraph.
• B) the automobile.
• C) steam engines.
• D) airplanes.
• E) ocean going ships.

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Definitions:

Logarithm

The power to which a base number must be raised to produce a given number.

Fechner's Law

A principle in psychophysics stating that the perceived intensity of a stimulus changes in proportion to the logarithm of the actual stimulus intensity.

Standard Stimulus

A specific environmental condition or stimuli that is consistently used throughout an experiment as a benchmark against which subjects' reactions or responses are measured.

Jnd

The just noticeable difference, the minimal change in stimulus intensity required to detect a difference between two stimuli.