Mercury has an angle of contact equal to 140° with glass. A nomor tube of
glass of radius imm is dipped in a trough of mercury. By what amount does
the mercury dip down in the tube relative to the liquid surface outside?
Surface tension of mercury at the temperature of the experiment is 0.465
Density of moreury - 136 * 10% ugm3 & g = 9.8mg-2

Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?

When using the scientist method, which step comes last?

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.