Is a Van de Graaff positive or negative? Most Van de Graaff generators build up a positive electric charge on their domes by separating negative electric charge from positive electric charge. This is accomplished by a rotating insulated belt. When two different materials are rubbed together, one object takes away electrons from the other object. […]
What are the factors affecting child development?
What are the factors affecting child development? 10 Factors That Influence the Growth and Development of a Child Heredity. Heredity is the transmission of physical characteristics from parents to children through their genes. Environment. Sex. Exercise and Health. Hormones. Nutrition. Familial Influence. Geographical Influences. How do you provide nurturing environment for your child? 6 Nurturing […]
What are the 5 types of lymphocytes?
What are the 5 types of lymphocytes? Five types of lymphocytes (Ig-theta-, Ig-theta+weak, Ig-theta+strong, Ig+theta- and Ig+theta+) characterized by double immunofluorescence and electrophoretic mobility. Are lymphocytes natural killer cells? Natural Killer (NK) Cells are lymphocytes in the same family as T and B cells, coming from a common progenitor. However, as cells of the innate […]
Which mirror is used in headlight of a car?
Which mirror is used in headlight of a car? Concave mirror is used in headlights of vehicles, because when the bulb of headlight is placed at focus of concave mirror, it allows the light to spread out to infinity (longer distances). A concave mirror is a converging mirror as opposed to a convex mirror which […]
How do you find the instantaneous rate of change of a derivative?
What is the eight second rule?
What is the eight second rule? The eight-second rule is key in digital marketing. It represents the length of time an e-mail sender has to convince a recipient to engage with the e-mail received or to convince a visitor to stay on a particular website. “The rule applies to first time visitors who are unfamiliar […]
Why is it called Cartesian coordinate system?
Why is it called Cartesian coordinate system? The Cartesian coordinate system is used to plot points. The Cartesian plane is named after the French mathematician and philosopher René Descartes (1596–1650), who introduced the coordinate system to show how algebra could be used to solve geometric problems. How are Cartesian planes used in real life? The […]
At what height do humans reach terminal velocity?
At what height do humans reach terminal velocity? A typical skydiver in a spread-eagle position will reach terminal velocity after about 12 seconds, during which time they will have fallen around 450 m (1,500 ft). At what height is a fall dangerous? Falls from more than 20 feet usually result in a trip to the […]
What happens when tension is doubled?
What happens when tension is doubled? The velocity of a travelling wave in a stretched string is determined by the tension and the mass per unit length of the string. So, if we double the tension the speed will increase 1.41 times or root (2) times. Why is velocity not proportional to wavelength? The greater […]
What is the 2 purposes of subscripts in chemical formulas?
What is the 2 purposes of subscripts in chemical formulas? A molecular formula is a representation of a molecule that uses chemical symbols to indicate the types of atoms followed by subscripts to show the number of atoms of each type in the molecule. (A subscript is used only when more than one atom of […]