To test how sound travels through solids, a simple phone can be made by tying a plastic cup at each end of a string (about 30 feet). Two people, one person at each end of the string, can transmit sound to one another by speaking into the cup at his or her end. The sound travels through the string in waves and reaches the other person's cup. Think about the sound can be changed in this investigation,
Which statements are true about how sounds heard through the cup phone can be changed?
To make the pitch of the sounds higher, students should use thicker string
Shortening the string between the cups will increase the volume
Students who wrap their hands around their cups will hear sound better than those who do not
To increase the volume on the opposite end of the string, ask a third person to pinch the string in the middle.
Lengthening the string between the cups will increase the volume.
Sound travels better through string than in air because sound travels best through solids.
A string with more tension carries sound better than one with less tension
Waves
gical advancement

Acetic acid  /əˈsiːtɪk/, systematically named  ethanoic acid  /ˌɛθəˈnoʊɪk/, is a colourless liquid  organic compound  with the  chemical formula  ch3cooh (also written as ch3co2h or c2h4o2). when undiluted, it is sometimes called  glacial acetic acid.  vinegar  is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water. acetic acid has a distinctive sour taste and pungent smell. in addition to household vinegar, it is mainly produced as a precursor to  polyvinyl acetate  and  cellulose acetate. it is classified as a  weak acid  since it only partially  dissociates  in solution, but concentrated acetic acid is corrosive and can attack the skin.acetic acidnamespreferred iupac nameacetic acidsystematic iupac nameethanoic acidother namesvinegar (when dilute); hydrogen acetate; methanecarboxylic acid[1][2]identifierscas number64-19-7  3d model (jsmol)interactive image3dmetb00009 reference506007chebichebi: 15366  chemblchembl539  chemspider171  drugbankdb03166  echa infocard100.000.528ec number200-580-7e numbere260  (preservatives)gmelin reference1380iuphar/bps1058keggd00010  meshacetic+acidpubchem  cid176rtecs numberaf1225000uniiq40q9n063p  un number2789inchiinchi=1s/c2h4o2/c1-2(3)4/h1h3,(h,3,4)  key:   qtbsbxvteameqo-uhfffaoysa-n  smilescc(o)=o

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