Page 13 - DJJ20063- Thermodynamics 1

DJJ20063- Thermodynamics 1

Example 1.3-1

Convert 1 km/h to m/s.

Solution to Example 1.3-1
1km = 1000 m

1 h = 3600 s

1 km 1 km 1000 m j 1
 = x x
j j 1 km 3600 s
1000 m
=
3600 s

= . 0 278 m/s

Example 1.3-2

3
3
Convert 25 g/mm to kg/m .

Solution to Example 1.3-2

1 kg = 1000 g

1 m = 1000 mm

3
3
1 m = 1000 x 1000 x 1000 mm
9
= 10 m 3
25 g 25 g 10 9 mm 3 1 kg
 = x x
mm 3 mm 3 m 1 3 1000 g

25 x 10 9 x 1 kg
=
1000 m 3
= 25 x 10 6 kg/m 3

4 | P a g e