Question

determinati masa unui cub de lemn cu latura de 10 cm . Exprimati rezultatul in g si odata in kg . URGENT !!!! dau coroana

Answer 1

a=10 cm=0,1 m
p(ro)=500 kg/m cub
p=m/V
m=p•V
V=a cub=(0,1 m) cub=0,001 m cub
m=500 kg/m cub•0,001 m cub
m=0,5 kg=500 g

Answer 2

qlemn= 660Kg/ m3
l=10 cm
Vcub=?
m=?
Vcub=l3
Vcub=10*10*10=100cm3
Vcub= 1000/1000000=0,001m3
q=masa/volum
q=m/V
m=q*V
m=660Kg/m3*0,001m3=0,66Kg
m=0,66*1000=660g