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10 drops of water (each radius = 0.5 cm) combine to form one big drop.
Density = 1000 kg/m³
Find the radius of the big drop.
A drop of oil has a diameter of 2 cm.
Density of oil = 800 kg/m³
Find the mass.
Which transmembrane proteins use ATP to transport ions against
their concentration gradient?
Why are tissues cut into small pieces (4–5 mm) before fixation?
