Last Review 3 ESO

1 How would you separate? A) A mixture of oil and water, b) a mixture of sand, water and iron c)a dissolution of water and alcohol.

2 List the basic and the derived magnitudes, indicating symbols and units

3 Convert these magnitudes to the IS units

813 mm                                                               12,5 mg

3,2 min                                                                234ºC(add 273,15K)

5,98 km²                                                             165 km/h

0.125 hm³                                                           77,7 h

23,14 ton                                                            25 L(dm³)

 4 Express into scientific notation with the number of digits between parenthesis:

0.00025698781 m (4)                                         235874 kg (3)

21.8754 l (2)                                                       0.012543 g/l (5)

5 When we measure the energy of an object against its speed, we get:

Speed m(s)	Energy (J)
2	8
4	32
5	50
6	72

Graph these results, determine the relationship and the equation for energy as a funcion of speed