Mienzaniso yemibvunzo pamusoro pekusimba uye mazinga ekusimba kweruzha

Mienzaniso gumi nerimwe yeKusimba kweRuzha uye Mazinga eRuzha

1. Ruzha rune simba re1 x 10^-9 W / m²Chii chinonzi simba rema decibels (dB)?
Kukurukurirana
Zvinozivikanwa kuti:
I = 1 x 10^-9 W / m²
I_o = 1 x gumi^-12 W / m²
Mubvunzo: Nhanho yeIntensity (dB)?
Mhinduro:

2. Simba reruzha mukamuri i100 dB. Simba reruzha mukamuri nderei?
Kukurukurirana
Zvinozivikanwa kuti:
TI = 100 dB
I_o = 1 x gumi^-12 W / m²
Mubvunzo: Ruzha rwakanyanya (I) mukamuri?
Mhinduro:

3. Mafungu maviri eruzha ane simba re1 x 10^-5 W / m² uye 1 x 10^-4 W / m²Musiyano uripo pakati pemazinga esimba mu dB ndewe…
Kukurukurirana
Zvinozivikanwa kuti:
I₁ = 10^-5 W / m²
I₂ = 10^-4 W / m²
I_o = 10^-12 W / m²
Mubvunzo: Musiyano muhuwandu hwesimba (TI) mu dB?
Mhinduro:
Musiyano mumazinga esimba?
TI₁ – IT₂ = 80 dB -70 dB = 10 dB

4. Sarudza chiyero chekusimba kwemanzwi maviri ane huwandu hwekusimba huri 10 dB uye 40 dB.
Kukurukurirana
Zvinozivikanwa kuti:
TI₁ = 10 dB
TI₂ = 40 dB
I_o = 10^-12 W / m²
Akabvunzwa: Kuenzanisa kusimba kwemanzwi maviri (I)₁ : Ini₂)?
Mhinduro:

Kuenzanisa kwesimba remanzwi maviri:
I₁ : Ini₂
10^-11 : 10^-8

5. Huremu hwenzwi hwemiridzo chiuru yakafanana inoridzwa pamwe chete i60 dB. Kana muridzo gumi dzakafanana dzikaridzwa pamwe chete, huwandu hwenzwi hunova….

1. 40 dB
2. 50 dB
3. 60 dB
4. 70 dB
5. 90 dB

Kukurukurirana

Zvinozivikanwa kuti:
TI 1000 muridzo = 60 dB
Akabvunzwa: Mhere dzeIntensity level 10
Mhinduro:

Kusimba kwemutambi mumwe chete:
TI 1000 muridzo = TI muridzo mumwe chete + 10 log x
60 = TI + 10 log 1000
60 = TI + 10 log 10³
60 = TI + (3)(10)(log 10)
60 = TI + (3)(10)(1)
60 = TI + 30
TI = 60 - 30
TI = 30 dB
Simba remutsindo mumwe chete i30 dB.

Kusimba kwemutambi mumwe chete:
TI 10 muridzo = TI muridzo mumwe chete + 10 log x
TI 10 miridzo = 30 + 10 log 10
TI 10 miridzo = 30 + 10 log 10¹
TI 10 miridzo = 30 + (1)(10)(log 10)
TI 10 muridzo = 30 + (1)(10)(1)
TI 10 muridzo = 30 + 10
TI 10 muridzo = 40 dB
Huremu hwema "whistles" gumi i40 dB.
Mhinduro chaiyo ndiA.

6. Huremu hweruzha hwemichina zana yakafanana mufekitori yemachira inoshanda panguva imwe chete i80 dB. Kana huremu hweruzha hwemimwe michina yakafanana iri 90 dB, saka huwandu hwemichina iri kushandiswa panguva iyoyo i….

1. 1.000 zvidimbu
2. 500 zvidimbu
3. 100 zvidimbu
4. 50 zvidimbu
5. 10 zvidimbu

Kukurukurirana
Zvinozivikanwa kuti:
Muchina weTI 100 = 80 dB
Akabvunzwa: huwandu hwemichina ine simba re90 dB
Mhinduro:
Kusimba kwemuchina mumwe chete:
Michina yeTI 100 = TI muchina mumwe chete + 10 log x
80 = TI + 10 log 100
80 = TI + 10 log 10²
80 = TI + (2)(10)(log 10)
80 = TI + (2)(10)(1)
80 = TI + 20
TI = 80 - 20
TI = 60 dB
Simba remuchina mumwe chete i60 dB.

Huwandu hwemichina ine simba re90 dB:
TI x muchina = TI muchina mumwe + 10 log x
90 = 60 + 10 log x
90 – 60 = 10 log x
30 = 10 log x
30 / 10 = log x
3 = danda x
3 = danda 1000

log 1000 = log 10 ³ = (3)(log 10) = (3)(1) = 3.

Huwandu hwemichina ine simba re90 dB i1000.
Mhinduro chaiyo ndiA.

7. Simba reruzha panzvimbo P, iri 3 m kubva panobva ruzha, i10 ^-4 watt/m2 ^. Poindi R iri 300 m kubva panobva ruzha. Kana simba remuganho I ₀ = 10 ^-12 watt/m2 ^, saka chiyero chemazinga esimba panzvimbo P naR chiri…

A. 1: 2
B. 2: 1
C. 2 : 3
D. 2: 4
Chikamu 3: 4

Kukurukurirana
Zvinozivikanwa :
Kusimba kweruzha panzvimbo P (I)_P= = 10^-4 W / m²
Kureba kwenzvimbo P kubva panobva ruzha (r)_P) = 3 mamita
Kureba kwenzvimbo R kubva panobva ruzha (r)_R) = 300 mamita
Kusimba kwemuganho (I)_o= = 10^-12 Watt/m²
Akabvunzwa : Kuenzanisa kwemazinga esimba pamapoinzi P neR (TI)_P : IT_R)
Jawab :

Fomura yehukama huripo pakati pekusimba uye daro :
I_p r_p² = Ini_R r_R²
Kusimba kweruzha paR :
(10^-4)(3²) = (Ini_R)(300²)
(10^-4)(9) = (Ini_R)(90000)
9 X 10^-4 = (Ini_R)(9 x 10⁴)
I_R = 9 x gumi^-4 : 9 x 10^-4
I_R = 10^-8
Kusimba kweruzha panzvimbo R i10^-8 W / m².
Kusimba kwesimba paP :
Nhanho yesimba muR :
Kuenzanisa kweTI pamapoinzi P naR :
80 dB: 40 dB
2: 1
Mhinduro chaiyo ndeiyi B.

8. Simba reruzha panzvimbo A, iri mita imwe kubva panobva ruzha, i10 ^-7 W/m ^2. Poindi B iri mamita zana kubva panobva ruzha. Kana simba remuganho riri 10 ^-12 W/m ² , chiyero chemazinga esimba paA neB ndeche…

A. 5: 3
B. 5: 1
C. 4 : 5
D. 4: 3
Chikamu 3: 1

Kukurukurirana
Zvinozivikanwa :
Kusimba kweruzha panzvimbo A (I)_A= = 10^-7 W / m²
Kureba kwenzvimbo A kubva panobva ruzha (r)_A) = 1 mamita
Kureba kwenzvimbo B kubva panobva ruzha (r)_R) = 100 mamita
Kusimba kwemuganho (I)_o= = 10^-12 Watt/m²
Akabvunzwa : Kuenzanisa kwemazinga esimba pamapoinzi A neB_A : IT_B)
Jawab :
Fomura yehukama huripo pakati pekusimba uye daro :
I_A r_A² = Ini_B r_B²
Kusimba kweruzha panzvimbo B :
(10^-7)(1²) = (Ini_B)(100²)
(10^-7)(1) = (Ini_B)(10.000)
1 X 10^-7 = (Ini_B)(1 x 10⁴)
I_B = 10^-7 : 10⁴
I_B = 10^-11
Kusimba kweruzha panzvimbo R i10^-11 W / m².
Kusimba kwesimba panzvimbo A :
Kusimba kwesimba panzvimbo B :
Kuenzanisa IT pamapoinzi A neB :
50 dB: 10 dB
5: 1
Mhinduro chaiyo ndeiyi B.

9. Mapoinzi A neB ane chinhambwe che800 m uye 400 m zvichiteerana kubva panobva ruzha. Kana uri munzvimbo A ukanzwa ruzha rune simba re10^-3 W / m², saka kuenzanisa kwemazinga esimba remapoinzi A naB ndiko… (log 2 = 0,3 naI_o = 10^-12 W / m²)
A. 11: 15
B. 15: 11
C. 15 : 16
D. 16: 11
Chikamu 16: 15
Kukurukurirana
Zvinozivikanwa :
Kusimba kweruzha panzvimbo A (I)_A= = 10^-3 W / m²
Kureba kwenzvimbo A kubva panobva ruzha (r)_A) = 800 mamita
Kureba kwenzvimbo B kubva panobva ruzha (r)_B) = 400 mamita
Kusimba kwemuganho (I)_o= = 10^-12 Watt/m²
Rogi 2 = 0,3
Akabvunzwa : Kuenzanisa kwemazinga esimba pamapoinzi A neB (TI)_A : IT_B)
Jawab :
Fomura yehukama huripo pakati pekusimba uye daro :
I_A r_A² = Ini_B r_B²
Kusimba kweruzha panzvimbo B :
(10^-3)(800²) = (Ini_B)(400²)
(10^-3)(640.000) = (Ini_B)(160.000)
(10^-3)(64) = (Ini_B)(16)
(10^-3)(4) = (Ini_B)(1)
I_B = 4 x gumi^-3 : 1
I_B = 4 x gumi^-3
Kusimba kweruzha panzvimbo B i4 x 10^-3 W / m².
Kusimba kwesimba panzvimbo A :
Kusimba kwesimba panzvimbo B :
Chiyero cheTI pamapoinzi P naR ndeichi:
90 dB: 96 dB
15: 16
Mhinduro chaiyo ndiC.

 10. Mapoinzi A naB ari mamita matatu nemamita masere kubva panobva ruzha. Kana ndikaita izvi_A uye ini_B chimwe nechimwe chiri kusimba kweruzha panzvimbo A nepakati B, wozotevera I_A : Ini_B iri…
A. 3: 2
B. 4: 9
C. 9 : 4
D. 16: 81
Chikamu 64: 9
Kukurukurirana:
Zvinozivikanwa :
r_A = 3 m, r_B = 8 XNUMX m
Akabvunzwa :
I_A : Ini_B ?
Jawab :
Kusimba kweruzha kwakaenzana zvakanyanya nechikwere chedaro renzvimbo kubva panobva ruzha:
Mhinduro chaiyo ndiE.

11. Kureba kubva paA kuenda kunobva ruzha kwakapetwa katatu nemana kupfuura daro kubva paB kuenda kunobva ruzha. Kana simba reruzha rwunonzwiwa naA riri I_o, saka simba rinonzwiwa naB ndiro...
A. 1/3 Io
B. 2/3 Io
C. 3/4 Io
D. 9/4 Io
E. 9/16 Io
Kukurukurirana:
Zvinozivikanwa :
r_A = 3/4r, r_B = r, ini_A = Ini_o
Akabvunzwa :
I_B =?
Jawab :

Mhinduro chaiyo ndiE.

Mibvunzo pamusoro pekusimba uye mazinga ekusimba kweruzha

1. Bhora rinokandirwa pasi rakamira kubva pachivako chine nhurikidzwa dzakawanda rine kumhanya kwekutanga kwe4 m/s uye rinosvika pasi mushure memasekonzi matatu. Rinomhanya sei kana rasvika pasi?
Mhinduro:
v_t = 30 m/s
2. Dombo rinokandwa mutsime rine kumhanya kwekutanga kwe12 m/s uye rinorova pamusoro pemvura yetsime mushure memasekonzi matatu. Gomba racho rakadzika zvakadii?
Mhinduro:
h = mamita 55
3. Kubva pachivako chakareba mamita zana, paki inokandwa yakatwasuka ichidzika pasi nekumhanya kwe5 m/s. Sarudza (a) nguva yekuti paki isvike pasi (b) Kumhanya kwepaki painosvika pasi
Mhinduro:
(a) t = masekondi mana (b) v_t = 45 m/s