Amagagasi amathathu omshini (Ubude besikhathi sokuvama kwegagasi Isivinini samagagasi) – Izinkinga nezixazululo
1. Amakhokho amabili aphezu kwamagagasi . Womabili ahamba phezulu naphansi phezu kolwandle izikhathi ezingama-20 ngemizuzwana emi-4. Uma ibanga lamakhokho womabili lingu-100 cm futhi phakathi kwawo, kunezimbobo ezimbili kanye nembobo eyodwa, nquma imvamisa yamagagasi kanye nesivinini samagagasi.
Kwaziwa:
Womabili amakhokho aphezu kwamagagasi futhi phakathi kwamakhokho amabili, kunezitsha ezimbili kanye ne-crest eyodwa (bheka isithombe). Ngakho-ke, kunezingqimba ezimbili zamaza phakathi kwamakhokho amabili.
Ubude begagasi (λ) = 100 cm / 2 = 50 cm.
Imvamisa (f) = 20/4 = 5 Hertz
Okufunayo: Imvamisa yamagagasi kanye nesivinini samagagasi
Isixazululo:
Imvamisa yegagasi (f) = 5 Hertz
The isivinini segagasi (v) = f λ = (5)(50 cm) = 250 cm/s
2. Isiphethu (esinqenqemeni) siyanyakaziswa ukuze kukhiqizwe amagagasi amade, lapho ibanga phakathi kokucindezelwa okubili okuseduze = 40 cm. Uma ijubane lamagagasi lingu-20 ms-1, nquma ubude be-wavelength kanye nemvamisa yamagagasi.
Kwaziwa:
Ibanga eliphakathi kokucindezelwa okubili okuseduze = ibanga eliphakathi kokunwetshwa okubili okuseduze = ibanga eliphakathi kwemigoqo emibili eseduze = ubude obungu-1 bewavelength
Ubude begagasi (λ) = 40 cm = 0.4 m
Ubude be-wavelength (v) = 20 m/s
Okufunayo: Ubude begagasi (λ) kanye nemvamisa yegagasi (f)
Isixazululo:
Ubude begagasi (λ) = 0.4 m
Imvamisa (f) = v / λ = 20 / 0.4 = 50 Hertz
3. Ebusweni bolwandle, kunezikhokho ezimbili ezihlukene komunye nomunye kuze kufike ku-60 cm. Zombili izikhokho ziya phezulu naphansi izikhathi ezingu-20 ngemizuzwana eyi-10. Uma enye iphezulu, enye iphansi kwegagasi. Phakathi kwezikhokho ezimbili, kukhona iphezulu legagasi. Thola isikhathi segagasi kanye nesivinini segagasi.
Kwaziwa:
Ubude begagasi (λ) = 60 cm / 1.5 = 40 cm
Imvamisa (f) = 20/10 = 2 Hertz
Kufunwa: Isikhathi kanye nesivinini samagagasi.
Isixazululo:
Inkathi (T) = 1/f = 1/2 = 0.5 imizuzwana
Isivinini segagasi (v) = f λ = (2)(40) = 80 cm/s
