\(\frac{{{\partial ^2}u}}{{\partial {t^2}}} = {c ^2}\frac{{{\partial ^2}u}}{{\partial {x^2}}}\) represents the equation for

Vibration of a stretched string

Motion of a projectile in a gravitational field

Oscillation of a simple pendulum

\(\frac{{{\partial ^2}u}}{{\partial {t^2}}} = {c ^2}\frac{{{\partial ^

1.	\(\frac{{{\partial ^2}u}}{{\partial {t^2}}} = {c ^2}\frac{{{\partial ^2}u}}{{\partial {x^2}}}\) represents the equation for
A.	Vibration of a stretched string
B.	Heat flow of a thin rod
C.	Motion of a projectile in a gravitational field
D.	Oscillation of a simple pendulum
Answer» B. Heat flow of a thin rod

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