# Tyry

Report 1
Measurement of basic constants
Length, weight and time

Hanoi University of Technology                                                 Instructor

Class:   BME-K54
Group: 1

Name:   Phí Ngọc Tú

I. EXPERIMETAL MOTIVATION
Use the vernier caliper to measure the height , diameter of hollow cylinder and use vernier micrometer to measure diameter of steel ball. Then calculate the volume of cylinder and ball, the density of hollow cylinder by using some equation that learned.

II.       EXPERIMENTAL RESULTS

1. Table measurement data height (h), external and internal diameter( D and d, respectively) of metal hollow cylinder.

Trial | D (mm) | Di- D(mm) | d   (mm) | di- d (mm) | h (mm) | hi–h (mm) |
1 | 34,92 | 0,008 | 28.10 | 0,012 | 9,44 | 0,008 |
2 | 34,90 | -0,012 | 28,08 | -0,008 | 9,44 | 0,008 |
3 | 34,92 | 0,008 | 28,08 | -0,008 | 9,42 | -0,012 |
4 | 34,92 | 0,008 | 28,10 | 0,012 | 9,42 | -0,012 |
5 | 34,90 | -0,012 | 28,08 | -0,008 | 9,44 | 0,008 |
Average | D=34,912 | | d=28,088 | | h=9,432 | |

2. Table measurement data diameter (Db) of the small ball.

Trial | Db1(mm) | Db1 - Db1(mm) | Db2(mm) | Db2 - Db2(mm) |
1 | 11,83 | 0,000 | 7,51 | 0,004 |
2 | 11,84 | -0,010 | 7,52 | -0,006 |
3 | 11,83 | 0,000 | 7,52 | -0,006 |
4 | 11,82 | 0,010 | 7,51 | 0,004 |
5 | 11,83 | 0,000 | 7,51 | 0,004 |
Average | D=11,830 | | D=7,514 | |

3. Calculate the volume and density of the metal hollow cylinder.

Using the following equations.

V = π4(D2- d2)h

ρ = mV

V = π4(34,9122 – 28,0882)9,432 = 3184,734

ρ = 26,523184,734 = 8,33 x10-3 (g/mm3)

4. Calculate the volume of the steel ball.

Using the following equation.

Vb = 16πDb3

Vb1 = 16π11,8303 = 866,868 (mm)3

Vb2 = 16π7,5143     = 222, 133 (mm)3

5. Calculate and comment the unsertanties of the volume and density of the metal hollow cylinder as well as the volume of the steel ball....