The vapor pressure of the water is lowered whenever a solute is added to a solvent because there are fewer solvent particles on the surface to evaporate. The diagram above shows that the vapor pressure of the solution is lower than that of the pure solvent, Therefore, the freezing point is also lowered.
Watch for signs of cervical dilation if you are near the end of your pregnancy. This indicates that you are in labor, and it's time to talk with your doctor or midwife. As the baby's head begins to press down on the opening of the uterus, the cervix will start to thin out and open.
Throughout your pregnancy your cervix has been tightly closed and protected by a plug of mucus. As the babyâs head drops down into the pelvis, it pushes against the cervix and causes the cervix to relax and thin out, or efface. When the cervix effaces, the mucus plug is loosened and passes out of the vagina.