Mafunde atatu a makina (Kutalika kwa Mafunde a Nthawi Yozungulira Liwiro la mafunde) - Mavuto ndi Mayankho
1. Zitseko ziwiri zili pamwamba pa mafundeZonse ziwiri zimakwera ndi kutsika pamwamba pa nyanja nthawi 20 mu masekondi 4. Ngati mtunda Kutalika kwa ma corks onse awiri ndi 100 cm ndipo pakati pawo pali ma drifts awiri ndi crest imodzi, zomwe zimatsimikizira kuti mafunde ambiri ndi liwiro la mafunde.
Zodziwika:
Ma corks onsewa ali pamwamba pa mafunde ndipo pakati pa ma corks awiriwa, pali ma troughs awiri ndi crest imodzi (onani chithunzi). Chifukwa chake, pali ma wavelength awiri pakati pa ma corks awiriwa.
Kutalika kwa mafunde (λ) = 100 cm / 2 = 50 cm.
Kuchuluka kwa nthawi (f) = 20/4 = 5 Hertz
SE basi: Kuchuluka kwa mafunde ndi liwiro la mafunde
Yankho:
Kuchuluka kwa mafunde (f) = 5 Hertz
The liwiro la mafunde (v) = f λ = (5)(50 cm) = 250 cm/s
2. Kasupe (wopapatiza) amagwedezeka kuti apange mafunde akutali, komwe mtunda pakati pa kupsinjika kwapafupi kwambiri ndi 40 cm. Ngati liwiro la mafunde ndi 20 ms-1, kudziwa kutalika kwa mafunde ndi mafunde.
Zodziwika:
Mtunda pakati pa kupsinjika kwapafupi kwambiri = mtunda pakati pa kufalikira kwapafupi kwambiri = mtunda pakati pa mitsinje iwiri yapafupi kwambiri = kutalika kwa 1 wavelength
Kutalika kwa mafunde (λ) = 40 cm = 0.4 m
Kutalika kwa mafunde (v) = 20 m/s
SE basi: Kutalika kwa mafunde (λ) ndi kuchuluka kwa mafunde (f)
Yankho:
Utali wa mafunde (λ) = 0.4 m
Kuchuluka kwa nthawi (f) = v / λ = 20 / 0.4 = 50 Hertz
3. Pamwamba pa nyanja, pali ma corks awiri olekanitsidwa wina ndi mnzake mpaka masentimita 60. Ma corks onsewa amakwera ndi kutsika nthawi 20 m'masekondi 10. Chimodzi chikakhala pamwamba, china chimakhala pamwamba pa mafunde. Pakati pa ma corks awiriwa, pali pamwamba pa mafunde. Dziwani nthawi ya mafunde ndi liwiro la mafunde.
Zodziwika:
Kutalika kwa mafunde (λ) = 60 cm / 1.5 = 40 cm
Kuchuluka kwa nthawi (f) = 20/10 = 2 Hertz
Akufuna: Nthawi ndi liwiro la mafunde.
Yankho:
Nthawi (T) = 1/f = 1/2 = masekondi 0.5
Liwiro la mafunde (v) = f λ = (2)(40) = 80 cm/s
