Fomula ya Mafunde Opingasa Mafunde Aatali Mafunde Osasuntha

Zitsanzo za mafunso ndi njira za mafunde opingasa, mafunde a longitudinal, mafunde osasinthasintha

Mafunde ozungulira

1. Mtunda pakati pa mitsinje iwiri yoyandikana ya mafunde a pamwamba pa madzi ndi mamita 20. Chinthu chimayandama pamwamba pa madzi ndipo chimamva kuyenda kogwedezeka. Ngati nthawi ya kugwedezeka kamodzi ndi masekondi 4, ndiye kuti liwiro la mafunde ndi…. m/s

1. 20
2. 15
3. 10
4. 5

Zokambirana
Amadziwika kuti:
Kutalika kwa mafunde (λ) = mamita 20
Nthawi (T) = masekondi 4
Anafunsa kuti: Liwiro la mafunde (v)
Yankho:
Fomula ya liwiro la mafunde:
v = λ / T = mamita 20 / masekondi 4 = mamita 5 / sekondi
Yankho lolondola ndi D.

2. Ma point awiri A ndi B ali pa chingwe ndipo ali 90 cm kutalikirana. Mafunde opingasa amafalikira pa chingwe , kotero kuti point A ili pamwamba pa mafunde, point B ili pansi pa mafunde, ndipo pakati pawo pali peaks ziwiri ndi pansi pa mafunde awiri. Ngati nthawi ya mafunde ndi masekondi 0,3, ndiye kuti liwiro la mafunde ndi….

1. 10,8cm/s
2. 18,0cm/s
3. 120,0cm/s
4. 200,0cm/s

Zokambirana
Amadziwika kuti:
Mtunda AB (l) = 90 cm
Nthawi ya mafunde (T) = masekondi 0,3
Kuchuluka kwa mafunde (f) = 1/0,3 masekondi
Mfundo A ili pamwamba pa mafunde, mfundo B ili pansi pa mafunde
Pakati pa mfundo A ndi B pali nsonga ziwiri ndi pansi ziwiri za mafunde
Anafunsa kuti: Liwiro la kufalikira kwa mafunde (v = f λ)
Yankho:
Kutengera chithunzicho, zatsimikiziridwa kuti pali ma wavelengths 2,5. Mtunda wa wavelength imodzi (λ) = 90 cm / 2,5 = 36 cm

Liwiro la kufalikira kwa mafunde:
v = f λ = (1/0,3) (36) = 36/0,3 = 120 cm/s.
Yankho lolondola ndi C.

3. Chithunzi chotsatirachi chikuwonetsa kusamuka kwa mfundo mu sing'anga ngati nthawi pamene mafunde akudutsa mu sing'anga.
Ngati kutalika kwa mafunde kuli mamita 6, ndiye kuti liwiro la kufalikira kwa mafunde ndi ...

1. 3 m / s
2. 6 m / s
3. 8 m / s
4. 12 m / s

Zokambirana
Amadziwika kuti:
Pali ma wavelength awiri kutengera graph yomwe ili pamwambapa.
Mtunda wa kutalika kwa 1 (λ) = mamita 6 / 2 = mamita 3.
Nthawi (T) = sekondi imodzi
Anafunsa kuti: Liwiro la mafunde (v)
Yankho:
v = f λ = λ / T = mamita 3 / masekondi 0,5 = mamita 6 / sekondi
Yankho lolondola ndi B.

Mafunde aatali

4. Magwero awiri a mawu amamveka nthawi imodzi mu sing'anga ndi kutentha komweko. Gwero loyamba la mawu lili ndi ma frequency a 640 Hz ndipo gwero lachiwiri la mawu ndi 1280 Hz. Mawu olondola ndi….

1. Liwiro la mawu oyamba ndi lalikulu kuposa liwiro la mawu achiwiri
2. Liwiro la mawu oyamba ndi laling'ono kuposa liwiro la mawu achiwiri
3. Liwiro loyamba ndi lachiwiri la mawu ndi lofanana
4. Utali mafunde a phokoso zonse ndi zazikulu zofanana

Zokambirana
Liwiro la mawu limadalira sing'anga, kotero ngati sing'anga ndi yofanana, liwiro la mawu onse awiri lidzakhala lofanana. Mosiyana ndi zimenezi, ngati ma frequency ali okwera, kutalika kwa mafunde kudzakhala kochepa, ndipo mofananamo, ngati ma frequency ali otsika, kutalika kwa mafunde kudzakhala kwakukulu. Ma frequency a mawu awiriwa ndi osiyana, kotero ma wavelength a mawu awiriwa adzakhalanso osiyana.
Yankho lolondola ndi C.

Mafunde osasinthasintha (mafunde oyima)

5. Chingwe chokhala ndi malekezero onse awiri cholumikizidwa chimapanga kamvekedwe koyambira ka ma frequency a 420 Hz. Ma frequency a ma overtone atatuwa ndi….

1. 840 Hz
2. 1260 Hz
3. 1680 Hz
4. 2940 Hz

Zokambirana
Amadziwika kuti:
Mafupipafupi oyambira (f)₁) = 420 Hz
Malekezero onse awiri a waya ndi omangiriridwa
Anafunsa kuti: Kuchuluka kwa mawu atatu owonjezera
Yankho:
Kuchuluka kwa mawu owonjezera achiwiri (f)₂) = 2 f₁ = 2 (420 Hz) = 840 Hz
Kuchuluka kwa mawu owonjezera achitatu (f)₃) = 3 f₁ = 3 (420 Hz) = 1260 Hz
Yankho lolondola ndi B.

Mafunde a phokoso

6. Chithunzi chili pansipa chikuwonetsa belu lamagetsi mkati mwa mpanda wotsekedwa. Belu limayimbidwa, kutulutsa mpweya kuchokera m'mpanda. Mpweya ukatulutsidwa kuchokera m'mpanda, phokoso la belu silimvekanso. Kutengera ndi chochitikachi, zitha kutsimikizika kuti phokoso...

1. sizimachitika pamalo otsekedwa
2. kunyamulidwa ndi mpweya wochokera m'chipinda chosungiramo zinthu
3. sizingafalikire mu malo opanda kanthu
4. sizingafalikire kudzera mu zinthu zolimba

Zokambirana
Phokoso ndi mafunde omwe amayenda mu zinthu zolimba, zamadzimadzi, ndi mpweya. Ngati belu lili mu vacuum, mafunde a phokoso sangayende kuchokera ku belu kupita ku khutu la womvera.
Yankho lolondola ndi C.

Gwero la funso:

Mafunso a OSN a Sukulu ya Sekondale ya Fiziki ya Sukulu ya Sekondale