Common compulsions include excessive cleaning and hand washing; repeatedly checking doors, locks, appliances, and such; rituals designed to ward off contact with superstitious objects; using prayers or chants to prevent bad things from happening; arranging and rearranging objects; and hoarding huge numbers of ordinary … What is considered compulsion? CompulsionsRead More →
Cyclic symmetry conditions are applied to the mechanical degrees of freedom in stress/displacement analysis and temperature degrees of freedom in heat transfer analysis. Do all shapes have translational symmetry? Translational symmetry is common in many of the patterns we see. It technically only exists in infinite patterns, but we canRead More →
Echinoderms have a spiny endoskeleton. They have radial symmetry as adults but bilateral symmetry as larvae. What is body symmetry of larvae in Echinodermata? Echinoderms take many forms of symmetry. … Echinoderm larvae are bilateral during their early development. During embryonic development of starfish and sea urchins, the position andRead More →
A rectangle has reflectional symmetry when reflected over the line through the midpoints of its opposite sides. Like the parallelogram, it also has rotational symmetry of 180º about its center. (as well as B onto A and C onto D). … Like the parallelogram, it also has rotational symmetry ofRead More →