1 Dietary supplements, such as vitamin D and probiotics, for atopic dermatitis. 2  Rice bran broth (applied to the skin) for atopic dermatitis. 3  Tea tree oil, either alone or added to your shampoo, for seborrheic dermatitis.  Fish oil supplements for seborrheic dermatitis.
Charged Particle in a Magnetic Field Suppose that a particle of mass moves in a circular orbit of radius with a constant speed . As is well-known, the acceleration of the particle is of magnitude , and is always directed towards the centre of the orbit.
Higher tier only. An atom is made up of two parts - a positively charged nucleus surrounded by negatively charged electrons. In an uncharged (neutral) atom there are the same number of positive and negative charges. When an acetate rod is rubbed with a duster, electrons are transferred from the rod onto the duster, making the rod positively charged.