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a) 1kg wody=1l=1dm^3
b) 1m^3=1000l=1000kg=1t
c)v=27l=27dm^3
v=a^3
27dm^3=a^3
a=3dm
3dmx3dmx3dm
d)
250g=1/4l=250cm^3
v=250cm^3
r=1/2*6cm=3cm
250cm^3=pi*r^2*h
250cm^3=9*pi*h
h=250/9pi=8,84cm
2.
a=2cm
h=5cm
v1=2*2*5=20cm^3
h2=h+3=8cm
v2=2*2*8=32cm^3
deltaV=32-20=12cm^3
v metalu=12cm^3
3.
h=6cm
v=1/4l=250cm^3
250cm^3=6cm*pi*r^2
250/6pi=r^2
r=3.64
h2=h+3=9cm
v2=9*pi*3.64^2=374.43cm^3
delta V=374.43-250=124.43cm^3
objętość metalu wynosi 124.43cm^3
4.
a)
500g=100%
x=3%
x=15g - ilość H2O2(nadtlenek wodoru)
500g-15g=485g - ilość H2O (tlenek wodoru)
b)
250g=97%
x=100%
x=257.73g
należy dolać 7.73g H2O2
5.
10^16
1319.2 mln
1319.2^16 litrów