What is the instantaneous acceleration of the particle at point b?

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

How do you lengthen a pattern piece? (family and consumer science, sewing)

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process