Răspuns:
instrument de masura
timpul
secunda
A=L×l
A=2m×150cm
150cm=1.5m
A=3m^2
digital
clasic(cu mercur)
K=T(C)+273,15
K=309,65
dilatare
250ml=250cm^3=V
densitatea=m:Volum
m=densitate×V
m=256.5g
2000g=2kg=m
G=m×g
g=10N/kg
G=20N
Ppatrat=4×l
P=20m
20m de sarma
V=L×l×h
L=l=40cm=4dm
h=50dm
V=800dm^3
V=0.8m^3
mult succes!