Лабораторные работы / Решенная лабораторная по физике 16

The laboratory work N^o 16.

The definition of the free length and effective diameter of air molecules.

Had done by the student gr: 220473я F.N.S. Pavlov F.E.

Checked by ______________________ date ____________

Purpose: To get acquainted from one of the methods of definition of microparameters (average of free length and efficient diameter of air molecules) through microparameters.

The order of performing a work:

1. Turn on tap. By waiting, when the water will begin to imply by drops, to switch a stop watch and to notice a level of water h in a vessel.

2. When the level of water in a vessel will decrease on 1 sm, to shut the tap.

3. Write down time of implying and new level h of water.

4. Write meanings of temperature t and pression p.

5. To evaluate a viscosity factor by the formula: .

6. To evaluatev the average free length by the formula: .

7. To evaluatev the efficient diameter of air molecules by the formula: .

8. The data of measurements and calculations to write in the table.

Where : r=1,0*10 m- the radius of capillary.

l= 2,*10 m- the length of capillary.

S= 19,6*10 m- area of in a vessel.

=1*10 kg/m- density of water.

R=8,31 Dj/mol*K- absolute gas constant.

K=1,38*10 Dj/k- Boltsman’s constant.

M= 2,9*10 kg/mol- molar weight of air.

g= 9.8 m/s - acceleration of gravity.

T=(t+273)K

h , m	h , m	, s	T, K	p, Pa	,kg/m*s	, m	d, m
0.18	0,17	63.26	293	102000	805*10	3.6*10	405*10

Conclusion:

so we have got acquainted from one of the methods of definition of microparameters (average of free length and efficient diameter of air molecules) through microparameters.