What frequency does a 4.5 meter sound wave have at 21.5 degrees Celsius?

What occurs during a combustion reaction

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell