Файл: ГДЗ. Физика 9кл_Перышкин_Гутник_2001.pdf

>Zgh

J_r_gb_

40.

|_| = 1,6 10-19 De

Fpk = Ff;

mv

= B|_|v r = mv =

v = 3 107 f k

2

m = 9,1 10-31 d]

r

B | e |

B = 8,5 10-3 Le

=

9,1 10−31

3 107

= 2 10-2

8,5 10−3

1,6 10-19

f

Hl\_l r = 2 10-2 f

GZclb r.

41.

< j amevlZl_ β

jZkiZ^Z 146 C → 147 N+-10e .

42.

2713 Al+01n → 2411N+24 He .

3+2−5 X =

0 n ²g_cljhg

43.

5 Al+ 3+2−5 X → 3N+2 He

10 7+4−10

7 4

7+4−10

1

EZ[hjZlhjgZy jZ[hlZ ‹

Bkke_^h\Zgb_ jZ\ghmkdhj_ggh]h ^\b`_gby [_a gZqZevghc kdhjhklb

<ZjbZgl

P_ev jZ[hlu m[_^blvky \ jZ\ghmkdhj_gghf oZjZdl_j_ ^\b`_gby

[jmkdZ b hij_^_eblv _]h mkdhj_gb_ b f]gh\_ggmx kdhjhklv

< ^Zgghf \ZjbZgl_ jZ[hlu bkke_^mxl oZjZdl_j ^\b`_gby [jmkdZ

ih gZdehgghc iehkdhklb K ihfhsvx ijb[hjZ bah[jZ`_ggh]h gZ

jbk

Z mq_[gbdZ

fh`gh

baf_jylv

fh^meb \_dlhjh\

i_j_f_s_gbc kh\_jr_gguo [jmkdhf aZ ijhf_`mldb \j_f_gb t1, t2 =

= 3t1,…, tn = nt1 hlkqblu\Z_fuo hl fhf_glZ gZqZeZ ^\b`_gby ?keb

2t1, t3

=

aZibkZlv ^ey ^Zgguo fh^me_c \_dlhjh\ i_j_f_s_gbc bo \ujZ`_gby

s =

at12

, s

2

=

at22

==

a(2t1 )2

=

22

s

,

s

3

=

at32

=

a(3t1 )2

=

32

s

3

,…,

1

2

2

2

2

1

2

2

2

s

=

atn2

=

a(nt1 )2

=

n2

s

,

lh fh`gh aZf_lblv ke_^mxsmx aZdhghf_jghklv

n

2

2

2

1

?keb wlZ aZdhghf_jghklv \uihegy lky

^ey baf_j gguo \

jZ[hl_

s1 : s2

: s3 : … : sn = 12

: 22

: 32 :…: n2 = 1 : 4 : 9 :…: n2.

fh^me_c \_dlhjh\ i_j_f_s_gbc lh wlh b [m^_l ^hdZaZl_evkl\hf lh]h

qlh ^\b`_gb_

[jmkdZ

ih gZdehgghc iehkdhklb y\ey_lky

jZ\ghmkdhj_gguf

Ijbf_j \uiheg_gby jZ[hlu.

AZ^Zgb_

Bkke_^h\Zgb_ oZjZdl_jZ ^\b`_gby [jmkdZ ih gZdehgghc

iehkdhklb

t, c

0

0,02

0,04

0,06

0,08

0,10

0,12

0,14

0,16

0,18

0,20

0,22

0,24

0,26

0,28

0,30

s ff

0

1

3

7

15

24

36

50

65

82

102

126

146

170

198

227

<uqbke_gby.

s2

=

3

= 3,

s3

=

7

= 7,

s4

=

15

= 15,

s5

=

24

= 24,

s1

1

s1

1

s1

1

s1

1

s6

=

36

= 36,

s7

=

50

= 50,

s8

=

65

= 65,

s9

=

82

=82,

s1

1

s1

1

s1

1

s1

1

s10

102

s 11

126

s12

146

s13

=

= 102,

=

= 126,

=

= 146,

=

s1

1

s 1

1

s1

1

s1

=

170

= 170,

s14

=

198

= 198,

s15

=

227

= 227.

s1

Hlkx^Z gZoh^bf

1

s1

1

1

s1 : s2 : s3

: s4

: s5 : s6 : s7 : s8

: s9 : s10

: s11 : s12 : s13 : s14

: s15

=

WlZ aZdhghf_jghklv g_ hq_gv kbevgh hlebqZ_lky hl l hj_lbq_kdhc

= 1 : 3 : 7 : 15 : 24 : 36 : 50 : 65 : 82 : 102 : 126 : 146 : 170 : 198 : 227.

aZdhghf_jghklb ^ey jZ\ghmkdhj_ggh]h ^\b`_gby LZdbf h[jZahf

fh`gh kqblZlv qlh ^\b`_gb_ [jmkdZ ih gZdehgghc iehkdhklb

y\ey_lky jZ\ghmkdhj_gguf

AZ^Zgb_

Hij_^_e_gb_ mkdhj_gby ^\b`_gby [jmkdZ

Mkdhj_gb_ [m^_f \uqbkeylv ih nhjfme_ a =

2s

.

t10 = 0,2 c; s10

= 102 ff = 0,102 f; a1

= (0,2 )2

t 2

.

= 5,1 f/k

2

0,102

2

t15 = 0,3 c; s15

= 227 ff = 0,227 f; a1

=

(0,3 )2

≈ 5,04 f/k

.

2

0,227

2

akj =

1

+ a

2

=

5,1

2 + 5,04

2

f k2.

a

AZ^Zgb_

Hij_^_e_gb_ f]gh\_gghc kdhjhklb [jmkdZ \ jZagu_

2

2

fhf_glu \j_f_gb b ihkljh_gb_ ]jZnbdZ aZ\bkbfhklb f]gh\_gghc

kdhjhklb v hl \j_f_gb t.

AgZq_gb_ f]gh\_gghc kdhjhklb [m^_f \uqbkeylv ih nhjfme_ v = at.

t = 0,1 c; v

f k2

k

f k

t = 0,2 c; v

f k2

k

f k

t 0,3 c; v

f k2

k

f k