Correcció examen

Prova A

A) 34,5·10^8mg · 1kg/1000000mg =3450kg

B) 90kg/h·1000m/1km·1h/3600s =25m/s

C) 3,6h·3600s/1h

D) 2,448·10^-4hm·100m/1hm =0,02448m

E) 75km/h·1000m/1km·1h/3600s =20,8333333...m/s

F) 12km/h·1000m/1km·1h/3600s =3,3333333...m/s

G) 2,5h i 15min

2,5h·3600s/1h = 9000s/x

15min·

H) 5·10^7mm·1m/1000mm =50000/1000 =5·10^4m

Prova B

A) 3,7·10^8mg·1kg/1000000mg =370kg =3,7·10^2kg

B) 120km/h·1000m/1km·1h/3600s =33,33333...m/s

C) 2,5h·3600s/1h =9000s

D) 1,167·10^-4hm·100m/1hm =0,01167m

E) 60km/h·1000m/1km·1h/3600s =16,6666...m/s

F) 15km/h·1h/3600s·1000m/1km =4,1666666...m/s

G) 0,5h i 45min = 0,5h·3600s/1h =1800s// 45min·60s/1min =2700s+1800s =4500s

H) 4·10^7mm·1m/1000mm =4·10^4m =40000m