Chemical properties of a metal nail

Which best explains why an iceberg floats?

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion