4 Zitsanzo za mafunso okhudza nthawi yozungulira komanso nthawi yogwedezeka
1. Chinthu A chimagwedezeka ndi ma vibration 75 pa sekondi, ndipo chinthu B chimagwedezeka ndi ma vibration 60 pa sekondi. Chiŵerengero cha ma frequency a chinthu A ndi chinthu B ndi...
A. 6: 7
B. 5: 4
C. 4: 5
D. 3: 5
Zokambirana
Mafupipafupi ndi chiwerengero cha kugwedezeka komwe kumachitika pa sekondi imodzi.
Kuchuluka kwa chinthu A = 75/sekondi = 75 Hertz
Kuchuluka kwa chinthu B = 60/sekondi = 60 Hertz
Chiŵerengero cha ma frequency a chinthu A ndi chinthu B ndi:
75: 60
75/15: 60/15
5: 4
Yankho lolondola ndi B.
2. Chiwerengero cha kugwedezeka mu sekondi imodzi chimatchedwa...
A. kuchuluka
B. pafupipafupi
C. nthawi
D. nthawi
Zokambirana
Chiwerengero cha kugwedezeka komwe kumachitika mu sekondi imodzi chimatchedwa kuchuluka kwa kugwedezeka, pomwe nthawi yomwe imafunika kuti munthu agwedeze kamodzi imatchedwa nthawi.
Yankho lolondola ndi B.
3. Gwero logwedezeka limapanga ma frequency a 20 Hz. Nthawi ya kugwedezeka ndi...
A. 20 s
B. 2 s
C. 0,5 s
D. 0,05 s
Zokambirana
Amadziwika kuti:
Kuchuluka kwa nthawi (f) = 20 Hertz
Anafunsa: Nthawi (T)
Yankho:
Mafupipafupi ndi chiwerengero cha kugwedezeka komwe kumachitika mu sekondi imodzi, pomwe nthawi ndi nthawi yomwe imafunika kuti munthu agwedeze kamodzi.
T = 1/f
T = 1/20 Hz
T = masekondi 0,05
Yankho lolondola ndi D.
4. Ngati chinthu chigwedezeka nthawi 600 mphindi 5 zilizonse, ndiye kuti nthawi yogwedezeka ndi...
A. Masekondi 0,5
B. Masekondi awiri
C. Masekondi 60
D. Masekondi 120
Zokambirana
Amadziwika kuti:
Nthawi (t) = mphindi 5 = masekondi 5 x 60 = masekondi 300
Chiwerengero cha kugwedezeka = kugwedezeka 600
Funso : Nthawi yogwedera (T)
Yankho:
Kuchuluka kwa kugwedezeka (f) ndi chiwerengero cha kugwedezeka komwe kumachitika mu sekondi imodzi, pomwe nthawi (T) ya kugwedezeka ndi nthawi yomwe imafunika kuti munthu agwedeze kamodzi.
Kugwedezeka kwafupipafupi (f) = kugwedezeka kwa 600 / masekondi 300 = kugwedezeka kwa 2 / sekondi
Nthawi yogwedera (T) = masekondi 300 / kugwedezeka kwa 600 = masekondi 3 / kugwedezeka kwa 6 = sekondi imodzi / kugwedezeka kwa 2 = masekondi 0,5/kugwedezeka
Yankho lolondola ndi A.
Gwero la funso:
Mafunso a Mayeso a Sayansi ya Sukulu ya Sekondale/Chisilamu cha Sukulu ya Sekondale
