Файл: ГДЗ. Физика 9кл_Перышкин_Гутник_2001.pdf

ν

=p

=

1

= 0,02

1

T =

ν

50

GZclb T.

Hl\_l T

k

2.

Ih ]jZnbdm gZoh^bf qlh T=

60

,

ν= T

= (1 60)c

=p

1

1

1

MijZ`g_gb_

Wlb ihey gbq_f g_ hlebqZxlky b kms_kl\h\Zeb [u [_a dZlmrdb K

MijZ`g_gb_

>Zgh

J_r_gb_

1.

T = 10-7 c

ν =

1

=

1

= 107

GZclb ν.

Hl\ l ν = 107

=p

T

10−7

c

>Zgh

J_r_gb_

2.

t = 8,3 10-7

c

S = ct = 3 108 f k 8,3 10-7 k

f

= 3 108 f k

GZclb S.

Hl\_l S = 249 f

>Zgh

J_r_gb_

3.

λ

f

ν =

c

=

3 10

8

= 5 105

= 3 108 f k

GZclb ν.

Hl\ l ν = 5 105 =p

λ

600

4.

AgZy kdhjhklv jZkijhkljZg gby kb]gZeZ k hgZ jZ\gZ kdhjhklb

k\_lZ b

\j_fy _]h

jZkijhkljZg_gby

t g_ljm^gh jZkkqblZlv

ijhc^_ggh_ jZkklhygb_ S AZ \j_fy t kb]gZe ijhc^_l jZkklhygb_ S

lm^Z b h[jZlgh b ke_^h\Zl_evgh S = ct/2.

5.

G_l a\mdh\u_ \hegu g_ jZkijhkljZgy_lky \ \Zdmmf_

MijZ`g_gb_

1.

126 ²Z _ f 63 Li ²Z _ f 2040 Ca

²Z _ f

2.

6, 3, 20.

3.

< n =

6

jZa

4.

Z [ Z _ f \ \ jZa ] ^ _ `

1

5.

6

→ 6+1

+−1

7

= 7 N ²Zahl

14

14−0

0

14

14

MijZ`g_gb_

147 N+24 He → 178O+11H Bf__f Ke_^h\Zl_evgh

aZdhg khojZg gby aZjy^Z \uihegy_lky

MijZ`g_gb_

1. <

y^j_ ZlhfZ [_jbeeby 49 Be

gmdehgh\ ² ijhlhgh\ ²

g_cljhgh\²N = A + Z = 9 – 4 = 5.

2. 39

Z Z

[ N = Z

\ Q

\ we_f_glZjguo

we_dljbq_kdbo aZjy^Zo ] Ne = Np

^ _ ` : a N =

19

p

± b m Z _ f

A – Z =

3. Qbkeh ijhlhgh\ khhl\_lkl\_ggh we_dljhgh\ \ Zlhf_ jZ\gh _]h

ihjy^dh\hfm

ghf_jm \ lZ[ebp_ F_g^_e__\Z ke_^h\Zl_evgh Z

eblbc [ nlhj

MijZ`g_gb_

Wlb Zlhfu bf_xl h^bgZdh\u_ fZkku gh bo obfbq_kdb_ k\hckl\Z

jZaebqgu Wlh h[tykgy_lky l_f qlh m gbo jZagu_ aZjy^h\u_ qbkeZ

Z agZqbl b dhebq_kl\h we_dljhgh\

MijZ`g_gb_

1.

238 U → 234Th+4 He .

; 234Pa → 234U+ 0e+0~ Ke_^h\Zl_evgh \

2.

234 Th → 234Pa+ 0e+0~

92

90

2

j_amevlZl_ ^\mo β jZkiZ^h\

91

92

−1 0

90

91

−1 0

\_ebqbgZ oZjZdl_jbamxsZy kdhjhklv i_j_f_s_gby Bkoh^y ba

mjZ\g_gby o = o0 + sx ihemqbf x = x0 + vxt.

>Zgh

J_r_gb_

6.

vx f k x0 f

x(t) = x0 + vxt x(t) = 3 + 5t.

GZclb x(t).

Hl\_l x(t) = (3 + 5t f

xl

x\

xi

X

>Zgh

J_r_gb_

xi = 260 – 10t

< gZqZevguc fhf_gl gZ[ex^_gby

= –100 + 8t.

xl = –100 + 8t

< fhf_gl \klj_qb xi

= xl beb±t

xi = 260 – 10

0 = 260; xl = –100 + 8

0 = –100.

Hlkx^Z gZoh^bf fhf gl \j_f_gb \klj_qb t = 20 c.

x

= 260 – 10 20 = –100 + 8

f

xi ,

Hl\_l xi = 260, xl

= –100, t = 20 c, x\

f

xl , t, x\.

8.

Kh]eZkgh ]jZnbdm iehl [ue kims_g gb`_ klhygdb gZ f_ljh\

Ih ]jZnbdm hij_^_ebf o0 = –10; vx

f k

f k o

= –10 + 2t.

>Zgh

J_r_gb_

9.

t = 2 c

a =

v − v0

=

v

; t1 =

v1

=

v1t

=

4,5

2

= 3 c;

v

f k

v0

= 0

t

t

a

v

3

v1

at12

vv12t 2

v12t

(4,5

)2 2

f k

s

= 2

=

2tv 2 =

2v

=

2 3

= 6,75

f

GZclb t1, s.

Hl\_l: t1 = 3 c, s = 6,75 f.

at 2

at

t

(v

(v

+ at ))

v0 + v

10. s = v

t +

= t v

+

=

+

=

t .

0

2

0

2

2

0

0

2

11. s = v0t +

at 2

a =

v − v

0

; s = v0t +

(v − v

0

)t

2

=

v

0

+ v

;

t ;

2

t

2t

2

v − v

0

v

0

+ v

1

((v, v0 )+ v 2 − v02 − (v0 , v ))=

v 2 − v 2

(a, s )=

,

t

=

0

t

2

2

2

a =

v 2 − v02

.

2s

>Zgh

J_r_gb_

12.