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Correct choice: 5,400 Km/h

Explanation:

Unit Conversions

We'll use the following conversions:

1 Km = 1,000 m

1 h = 3,600 s

Convert the speed of sound in water (1.5\cdot 10^3\ m/s) to Km/h:

Correct choice: 5,400 Km/h

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

c) up is the direction the magnetic force is acting on the charge.