- A young girl is learning how to tune her violin. She plays a tuning fork on her string and hears 2 beats per second when listening to the combined sound. She tightens the string and then hears 3 beats per second when the two sounds are played together. In order to tune hr violin string, what should she do any why?
- Explain why we always see lightning before we hear thunder. (Simple Physics Standpoint)
- Loosening the string will reduce the "beat frequency," i.e. the difference in the frequencies of the two notes.
- Light travels much faster than sound...?
@MITer94 Bahaha thanks for #1! But yeah #2 is odd. I understand light travels faster than sound, but no idea what “physics standpoint” they are looking for.
Me neither. What is the source of these questions?
Lightning produces the flash and the thunder sound at the same time. Both the light and the sound travel the same distance from the lightning point to the eyes and the ears of the observer. The light speed is 300,000 km/sec. The sound speed is 330 m/sec. Therefore the light reaches the eye retina before then sound reaches the ear drum.