Why is hole mobility less? Conduction electrons (free-electrons) travel in the conduction band and valence electrons (holes) travel in the valence band. Since holes are subjected to the stronger atomic force pulled by the nucleus than the electrons residing in the higher shells or farther shells, holes have a lower mobility. How is carrier mobility […]
Why does current change from positive to negative?
Why does current change from positive to negative? The direction of an electric current is by convention the direction in which a positive charge would move. Thus, the current in the external circuit is directed away from the positive terminal and toward the negative terminal of the battery. Electrons would actually move through the wires […]
How do you increase ink flow in a ball pen?
How do I calculate change in velocity?
How do I calculate change in velocity? Multiply the acceleration by time to obtain the velocity change: velocity change = 6.95 * 4 = 27.8 m/s . Since the initial velocity was zero, the final velocity is equal to the change of speed. You can convert units to km/h by multiplying the result by 3.6: […]
Why do stars move when I stare at them?
Why do stars move when I stare at them? You’re absolutely right that stars twinkle — and sometimes appear to move around — due to our atmosphere “scrambling” their light as it travels from the top of Earth’s atmosphere to the ground. First, stars close to the horizon twinkle more because their light must travel […]
What are the characteristics of a groundwater?
What are the characteristics of a groundwater? Some of the most typical characteristics of groundwater are weak turbidity, a constant temperature and chemical composition and almost overall absence of oxygen. Circulating groundwater can have extreme variation in the composition with the appearance of pollutants and various contaminants. What is groundwater hydrology? Hydrogeology is the study […]
Is potato an edible root?
Is potato an edible root? Common potatoes and sweet potatoes are both edible roots. The common potato (Solanum tuberosum) is an annual and a member of the nightshade family. More than 100 varieties are cultivated as food crops. Is potato a stem or root? Potatoes, grown in cooler climates or seasons around the world, are […]
Can you block access to a cemetery?
Can you block access to a cemetery? In California, see Laurel Hill Cemetery v. Often, the right to prohibit or limit the location of cemeteries within a certain district or area rests on the proposition that a burial within such district would be injurious to the public health. Is owning a cemetery profitable? But it’s […]
When should you use fluoride mouthwash?
When should you use fluoride mouthwash? Using a mouthwash that contains fluoride can help prevent tooth decay, but don’t use mouthwash (even a fluoride one) straight after brushing your teeth or it’ll wash away the concentrated fluoride in the toothpaste left on your teeth. Choose a different time to use mouthwash, such as after lunch. […]
How is chalk rock formed?
How is chalk rock formed? They’re formed from the skeletal remains of minute planktonic green algae that lived floating in the upper levels of the ocean. When the algae died, their remains sank to the bottom of the ocean and combined with the remains of other creatures to form the chalk that shapes the cliffs […]