Search results
Results from the WOW.Com Content Network
In chemistry and crystallography, a symmetry element is a point, line, or plane about which symmetry operations can take place. In particular, a symmetry element can be a mirror plane , an axis of rotation (either proper and improper), or a center of inversion .
This glossary of chemistry terms is a list of terms and definitions relevant to chemistry, including chemical laws, diagrams and formulae, laboratory tools, glassware, and equipment. Chemistry is a physical science concerned with the composition, structure, and properties of matter , as well as the changes it undergoes during chemical reactions ...
By convention, the axis of proper rotation of greatest order is defined as the principal axis. All other symmetry elements are described in relation to it. A vertical mirror plane (containing the principal axis) is denoted σ v; a horizontal mirror plane (perpendicular to the principal axis) is denoted σ h.
A strictly proper transfer function is a transfer function where the degree of the numerator is less than the degree of the denominator. The difference between the degree of the denominator (number of poles) and degree of the numerator (number of zeros) is the relative degree of the transfer function.
Authorities in the United States have reviewed airport security footage as they continue to investigate how a woman sneaked on board a Delta Air Lines flight from New York to Paris without a ...
Proper morphism, in algebraic geometry, an analogue of a proper map for algebraic varieties; Proper transfer function, a transfer function in control theory in which the degree of the numerator does not exceed the degree of the denominator; Proper equilibrium, in game theory, a refinement of the Nash equilibrium; Proper subset; Proper space ...
2. Hoppin’ John. Southerners are usually eating Hoppin’ John (a simmery mix of black-eyed peas and rice) on New Year's Day. Like most “vegetable” recipes from around this area, it contains ...
He went on to express his disbelief over the negative reception for Zoolander 2, which currently sits on Rotten Tomatoes with a 22% from critics and an even lower audience score.. Stiller said of ...