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physics problems for high school
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29 ( )
29 2015
: 10.00 - 13.00
:1. (9) (7) .
2. .
3. .
4. .
5. .
6. . ( ).
7. .
8. : = 9, 81/2 .
1 ( 15). .
(. 1)
. .(. 1)
. . . .
29 ( )
0. , . - .
(. 5)
. 1, 00 kg 1 2 1 = 0, 75 kg 2 = 0, 25 kg, , 1 2. - , 2 = 21. .
1
2
2
1
i. .(. 1)
ii. , , - .
(. 2)iii. = 20 m/s
= 16 m . .
(. 5)
2
29 ( )
2 ( 10) , . - , . . - .
. - . - = 132.
(. 3)
. - -
=
3( + )
(. 5)
. / =/2.
(. 2)
bO
3 ( 15) . - 2. 2 . . .
2
2
/2 /2
/2 ( )
3
29 ( )
. .
=4
.
4 ( 20). .
(. 3)
. - . .
i. .
(. 5)ii. 1062, 5 Hz
1, 20m . : = 340 m/s.
(. 3)
. .
i. , .
(. 4)
4
29 ( )
ii. - 106, 25 Hz, = 1, 20 m - 34, 0 m/s.
(. 3)iii. ,
, - .
(. 2)
5 ( 15).
, .
i .
. =
(. 4)ii
.(. 1)
. 1 2 . - . , . .
5
29 ( )
1
2
- .
i. (Laplace) .
(. 2)ii. ,
. .(. 4)
iii. , , .
(. 4)
6 ( 10). -
(Rutherford) :
1 .
2 . 3 -
.
- .
(. 3)
. - , (Bohr).
6
29 ( )
= 1
= 2
= 3
= 4 = 5
1 = 13, 6 eV
2 = 3, 4 eV
3 = 1, 51 eV
4 = 0, 85 eV5 = 0, 544 eV
- .
i. .
(. 3)ii.
. . : Planck: = 6, 61034 J/s, 1 eV = 1, 61019 J, =380 nm, = 780 nm, = 3 108 m/s.
(. 4)
7 ( 15) . -
= 0, 5 kg = 0, 1 m, = 4 mm - . , - . - . , . , , = 70 cm. H . - - . . - - .
7
29 ( )
. , - . .
. , t, , h, . , h, R, r, t.
(. 4)
. , t, - , h, . .
(m) 0,5 0,4 0,3 0,2 0,1
(s) 5,5 5,0 4,4 3,6 2,5
i. , h, , t, - . - .
(. 3)ii. .
(. 2)iii. -
. - , = 2/2.
(. 2)
. . . . , . .
(. 4)
: - , ( ), - . - . , . .
8
29 ( )
. 10, . - . . . 103 ( 3), 2 103, 3 103, ... ,8 103,9 103 104. - 10 9000. log 103 = 3 log 104 = 4.: - .
9
29 ( )
1
2
3
4
5
678910
2
3
4
5
678910
2
3
4
5
678910
2
3
4
5
678910
1 2 3 4 5 6 7 8 910 2 3 4 5 6 7 8 910 2 3 4 5 6 7 8 910
102
10-2
10-1 100 101 102
10-1
100
101
(s)
(m
)
10