the 440Hz and the 441 Hz tone bars are to be placed horizontally on stable surface. strike both tone bars with the hammer.
10. what do you hear? report any pattern you hear to the sound generated.
11. when striking a single tone bar sprinkles some powder or sand into the bar and watch the powder. what observation can you make?
what is the name of this location?
beat frequency
eg
http://hyperphysics.phy-astr.gsu.edu/hbase/Sound/beat.html
google
nodes
normal modes
eg
http://en.wikipedia.org/wiki/Normal_mode
so it creates a beat. powder goes to 2 points on the bar and the points are called nodes.
yes, you have the idea. The points on the bar that do not move are the nodes. The sand flies off the rest of the bar.
To answer question 10, when you strike both the 440Hz and the 441Hz tone bars with a hammer placed horizontally on a stable surface, you will hear two distinct tones. The 440Hz tone will have a lower pitch, while the 441Hz tone will have a slightly higher pitch. You might notice that the pattern of the sound generated by each tone is different, with the 440Hz tone sounding deeper and the 441Hz tone sounding slightly higher.
Now, moving on to question 11, when you strike a single tone bar and sprinkle powder or sand onto it, you can make an observation. The powder or sand will vibrate due to the sound waves produced by the tone bar. You might notice a pattern forming on the surface of the powder or sand, corresponding to the areas where the tone bar vibrates more intensely. The powder or sand particles might collect and settle in those areas, creating a visual representation of the vibrational pattern of the tone bar.
However, based on the information you provided, there isn't any mention of a specific location associated with these experiments.