Odpowiedzi

2009-11-29T13:31:41+01:00
A=0,2m
b=25cm=0,25m
c=10dm=1m
V=abc=0,2m*0,25m*1m=0,05m3

q=2700kg/m3
m=q*V
m=2700kg/m3*0,05m3=135kg
7 4 7
2009-11-29T13:36:09+01:00
A=0,2m
b= 25cm=0,25m
c=10dm=1m
V=0,2m x0, 25m x 1m
V=0,05 m3

d= m/V
m=d x V
m=2700kg/m3 x 0,05m3
m=135kg
3 5 3
2009-11-29T13:47:57+01:00
A = 0,2m = 20cm
b = 25cm
c = 10dm = 100cm
d = 2700 kg/m3

V = a*b*c
V = 20*25*100 = 50000cm3 = 50dm3 = 0,05m3

d = m/V
m = d*V
m = 2700kg/m3 * 0,05m3 = 135kg

2 5 2