It is a vector. A scalar has only magnitude. A vector has magnitude and direction. Acceleration is a vector because it has magnitude and direction. That's why an object can be said to be accelerating if it has a circular rotation and a constant speed; even though it's speed isn't changing, it's direction constantly is.ass is a scalar quantity because it doesn't have direction. Acceleration is a vector quantity because it has both magnitude and direction.
1. Exogenous Causes. 1  Dry Skin is the most common and obvious cause of itchy soles of the feet. 2  Contact Dermatitis is a skin reaction, which results from the exposure to allergens or irritants, such as certain soaps, cosmetics, detergents or even some plants, such as poison ivy.
Itâs usually just a cosmetic or nuisance for the majority of people, but if cracks start to appear, then it can be painful to even stand. The most common cause of dry, cracked heels is insufficient moisture. Over time, the dryness can cause cracks, or heel fissures. These cracks can get deep and cause bleeding. In severe cases, there can be a risk of infection through the open cracks / fissures. Dry heels can be caused by a number of reasons: