For a typical steel framed 30 ft by 30 ft office building bay, the fre-quency will be in the 5-8 Hz range. Frequency is a function of span (the longer the span, the lower the frequen-cy) and weight supported (the heavier the floor and the supported contents, the lower the frequency).
Anxiety doesn't appear to cause any dramatic changes to your skin color. You're not going to turn blue or purple. But some degree of skin color change is normal with anxiety and stress, especially under extreme anxiety like during a panic attack.
Factors responsible for Pigmentation. 1  Melanin may be the pigment which gives the skin its shade. 2  The amount of melanin from the skin is liable for the gentle or dark tone. 3  Pigmented wounds are generally dark within shade due to the fact that melanin can be a lot more centered in one section of the skin.