0.0023 = 2.3 × 10^-3, moving the decimal three places to the right yields the exponent -3.

The block header indicates option A as the answer in the scanned material.

134.7 = 1.347 × 10^2, which is the proper scientific notation with one non-zero digit before the decimal.

A manometer is an instrument used to measure pressure of gases or liquids.

A periscope allows submariners to view objects above the water surface while remaining submerged.

To display voltage versus time on an oscilloscope, the signal goes to the Y input and the time base must be on to provide the horizontal sweep.

Daniel Gabriel Fahrenheit developed the mercury thermometer.

In the book's context an ammeter is described as essentially a galvanometer (with shunt), and the statements are presented collectively as true.

A fathometer measures the depth of water (ocean depth) beneath a vessel.

Displaying both waveforms simultaneously allows direct comparison of corresponding points in time to measure phase difference.