The nall rolled 20 cm in 5 seconds
The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases. As the amplitude of the sound wave increases, the intensity of the sound increases. Sounds with higher intensities are perceived to be louder.
Answer: 6.3
Explanation:
The ratio of brightness of two stars is given by:
Where:
is the brightness of star 1
is the brightness of star 2
is the magnitude of star 1
is the magnitude of star 2
Finally:
This is the ratio of brightness