4 Mehlala ea lipotso tsa nako ea maqhubu le ea ho thothomela
1. Ntho A e thothomela ka ho thothomela ha 75 ka motsotsoana, mme ntho B e thothomela ka ho thothomela ha 60 ka motsotsoana. Karolelano ea maqhubu a ntho A ho ntho B ke...
K. 6: 7
B. 5: 4
C. 4: 5
D. 3: 5
Puisano
Maqhubu ke palo ea ho thothomela ho etsahalang ka motsotsoana.
Makgetlo a ntho A = 75/motsotsoana = 75 Hertz
Makgetlo a ntho B = 60/motsotsoana = 60 Hertz
Karolelano ea maqhubu a ntho A le ntho B ke:
75: 60
15/75: 15/60
5: 4
Karabo e nepahetseng ke B.
2. Palo ea ho thothomela ka motsotsoana o le mong e bitsoa...
A. boholo ba matla
B. maqhubu
C. nako
Nako ea D.
Puisano
Palo ea ho thothomela ho etsahalang ka motsotsoana o le mong e bitsoa maqhubu a ho thothomela, ha nako e hlokahalang ho etsa ho thothomela ho le leng e bitsoa nako.
Karabo e nepahetseng ke B.
3. Mohloli o thothomelang o hlahisa maqhubu a 20 Hz. Nako ea ho thothomela ke...
A. 20 s
B. 2 s
C. 0,5 s
D. 0,05 s
Puisano
Hoa tsebahala hore:
Makgetlo (f) = 20 Hertz
E botsitsoe: Nako (T)
Karabo:
Makgetlo ke palo ya ho thothomela ho etsahalang ka motsotsoana o le mong, athe nako ke nako e hlokahalang ho etsa ho thothomela ho le mong.
T = 1/f
T = 1/20 Hz
T = metsotsoana e 0,05
Karabo e nepahetseng ke D.
4. Haeba ntho e thothomela ka makgetlo a 600 metsotsong e meng le e meng e 5, nako ya ho thothomela ke...
A. Metsotsoana e 0,5
B. metsotsoana e 2
C. metsotsoana e 60
D. Metsotsoana e 120
Puisano
Hoa tsebahala hore:
Nako (t) = metsotso e 5 = metsotsoana e 5 x 60 = metsotsoana e 300
Palo ea ho thothomela = ho thothomela ho 600
Potso : Nako ea ho thothomela (T)
Karabo:
Makgetlo a (f) a ho thothomela ke palo ya ho thothomela ho etsahalang ka motsotsoana o le mong, ha nako (T) ya ho thothomela e le nako e hlokahalang ho etsa ho thothomela ho le hong.
Maqhubu a ho thothomela (f) = ho thothomela ha 600 / metsotsoana e 300 = ho thothomela ha 2 / motsotsoana
Nako ea ho thothomela (T) = metsotsoana e 300 / ho thothomela ha 600 = metsotsoana e 3 / ho thothomela ha 6 = motsotsoana o le mong / ho thothomela ha 2 = metsotsoana e 0,5/ho thothomela
Karabo e nepahetseng ke A.
Mohloli oa lipotso:
Lipotso tsa Tlhahlobo ea Naha ea Saense ea Sekolo se Phahameng sa Bana ba Banyenyane/Sekolo se Phahameng sa Boislamo
