The Speed of Sound in Air Is Approximately $340 ~ { \mathrm { m } } / \mathrm { s } \text {. }$

question 21

Essay

The speed of sound in air is approximately $340 ~ { \mathrm { m } } / \mathrm { s } \text {. }$ .The speed of light in air is approximately $3 { \times } 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$ .If a lightning strike occurs 3 km away, how much time elapses before you hear the
thunder?

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Definitions:

Pulse-width

The duration of time that a pulse in a pulse modulation system is at a high or significant level, important in determining signal characteristics.

ServoDisc Motor

A motor that employs a printed circuit board as the armature.

Printed-circuit

An electronic circuit in which conductive paths are printed onto a non-conductive substrate, used in the fabrication of electronic devices.

Laminated

Something made of thin sheets stacked together.