Soal Gelombang Stasioner 1

1 . Pe r s a ma ma ans u at ug el o mb mb an gs t a t i o ne rd i b er i k a ns e ba ga ib er i k u ty=0 , 5s i n( 0 , 1 25πx )c o s ( 2 0πt )d e ng a nyd a nxd a l a ms a t u a nc md a ntd a l a ms e k o n .Ce p atr a mb mb a tg e l o mb mb a ng t er s ebutadal ah. . . . A.8 0c m/ m/ s B.1 2 0c m/ s C.160cm/ m/ s D.180cm/ m/ s E.2 4 0c m/ s 2. Di be r i k a np er s ama ang el o mb mb an gs t a t i o ne ru j u ngt e r i k ats e ba ga ibe r i k u ty=0 , 3s i n( 0, 25πx ) c o s( 1 0πt )d en g anyda nxd a l a ms a t u anc md antd al a ms e k o n .Amp l i t u doge l o mb mb an ga s a l y a ngme me mb mb en t u kge l o mba mb ngs t a t i o nert er s e bu ta da l a h. . . . A.1 , 5mm mm B.3 , 0mm mm C.4, 5mm mm D.6, 0mm mm E.7 , 5mm mm 3 . Ge l o mb mb an gme r a mb mb ats e p an j a ngt a l i d and i p an t u l k a no l e hu j u ngb eb ass e hi n gg at e r b en t u k gel ombangs t at i oner .Si mpangant i t i kPy angber j ar akxdar i t i t i kpant ul memi l i k i per s amaan: y =4c os( 5 πx )s i n( 2 0πt )d en g anxd anyd al a m me t e rd antd al a ms e k o n.Ce pa tr a mb mb at p  gel ombangt er s ebutadal ah. . . . A.8m/ m/ s B.5m/ m/ s C.4m/ m/ s D.5 / 4m/ m/ s E.1 / 4m/ m/ s 4 . Ge l o mb mb an gme r a mb mb ats e p an j a ngt a l i d and i p an t u l k a no l e hs u a t uu j u ngt e t a ps e h i n gg a t er bent ukgel ombangs t at i oner .Si mpangant i t i kPy angber j ar akxdar i t i t i ki k atmemi l i k i p e r s a ma ma a n: y =0, 4s i n( 0, 2πx )c os( 20πt ) p  d en ga nxd anyd al a mc e nt i me t e rd antd al a ms e k on .Pa nj a ngge l o mb mb an gt e r s e bu ta da l a h. . . . A.5c m B.1 0c m C.1 5c m D.2 0c m E.2 5c m 5 . Pe r s a ma ma ans ua t uge l o mb mb an gs t a t i o ne ra da l a hy=0 , 3 75s i n( 0 , 2 5πx )c o s( 2 5πt )d en ga ny d anxd al a ms a t u anc md antd al a ms e k on .J a r a kan t a r ad uape r u ty a ngbe r d ek a t a na da l a h. . . .

A.1c m B.2c m C.3c m D.4c m E.5c m 6 . Pe r s a ma ma ans u a t uge l o mb mb an gs t a t i o ne ra da l a hy=0 , 5s i n( 0 , 1 25πx )c o s( 2 0πt )d en g any danxd al am s at uanc m dantdal am s ek on.J ar akper utk eduadar i t i t i kpant ul n y aadal ah. . . . A.8c m B.9c m C.1 0c m D.1 1c m E.1 2c m 7 . Su at ug el o mb mb an gme me r a mb mb atp ad as eu t a st a l i y a n gme me mi mi l i k i u j u ngb eb ass e h i n gg a me mb mb e nt u ks e b ua hg el o mb mb a ngs t a t i o n erd e ng a np er s a ma ma a nyp  =5c os( 0 , 1 25πx )s i n( 50πt ) d en ga nxda nyda l a m me t e rd antd al a ms e k on .L et a ks i mp ul k e t i g ad ar i u j u ngp an t u l n y a adal ah. . . . A.2 0c m B.4 0c m C.6 0c m D.8 0c m E.1 00c m 8 . Su at ug el o mb mb an gme me r a mb mb atp ad as eu t a st a l i y a n gme me mi mi l i k i u j u ngb eb ass e h i n gg a π me mb mb e nt u ks e b ua hg el o mb mb a ngs t a t i o n erd e ng a np er s a ma ma a nyp  =4cos  / ( x )s i n( 50πt ) 30 

d en ga nxd a nyd a l a m me t e rd antd al a ms e k o n .Si mp an ga nma k s i mu ms u a t ut i t i ks a a tx=10 c m adal ah. . . . A.1c m B.2c m C.3c m D.4c m E.5c m 9 . Ge l o mb mb an gs t a s i o ne rd ap att e r j a di k a r e nas up er p os i s i g el o mb mb an gd at a ngda ng el o mb mb an g pant ul uj ungb eb as .Ti t i ks i mpul y angk es epul u hber j ar ak1, 52cm dar i uj un gbebas ny a.J i k a f r e k ue ns i g el o mb mb an gi t ua da l a h5 0Hzma ma k al a j ur a mb mb atg el o mb mb an gn y a . . . . A.1 6m/ m/ s B.3 2m/ m/ s C.48m/ m/ s D.64m/ m/ s E.7 2m/ m/ s

1 0.Se ut a sk a wa tb er g e t a rme nu r u tp er s a ma ma any=0 , 5 0s i n / (π 3  x )c o s( 4 0πt )d en ga nyd anx dal am c m dantdal am s ek on.J ar akper utk et i gadar i t i t i kx=0adal ah. . . . A.1 0c m B.7, 5c m C.6 , 0c m D.5 , 0c m E.2, 5c m