(Redirected from Somatoform disorder). A somatic symptom disorder, formerly known as a somatoform disorder, is a category of mental disorder included in a number of diagnostic schemes of mental illness, including the DSM-5.
Piano uses all 10 fingers, and harp only uses 8. On piano, you have to understand more theory about when to use the black keys than you do on harp, which uses levers or pedals that often donât change through an entire song. Both instruments require you to use two hands to play two sets of notes.
1 What Happens When Silk Is Rubbed on a Glass Rod?  As any bored kid at a wedding reception can tell you, wine and water glasses can make a symphony of noises. Tap on the side of a drinking glass with a hard object, and it rings like a bell. Run a wet finger around the rim of a wine glass, and it will sing. Adding liquid changes the pitch, or the note. All very entertaining, but maybe you've been curious about the science behind the ping.