What do arrows mean in UML?
Space and AstronomyThe UML class diagram maps out the object’s attributes, operations, and how they relate. The arrows that connect classes show important relationships. The arrows denote association, inheritance, aggregation, composition, dependency, and realization among others. What does dotted arrows mean in UML? The dashed arrow (from client to ConcreteCommand) means that there is an (unidirectional) association
How far away are the Lagrange points?
Space and AstronomyIn the Earth-Sun system the first (L1) and second (L2) Lagrangian points, which occur some 1,500,000 km (900,000 miles) from Earth toward and away from the Sun, respectively, are home to satellites. The Solar and Heliospheric Observatory is at L1, because that point allows continuous study of the Sun. Where are the 5 Lagrange points
How do you prove the converse of the perpendicular bisector theorem?
Space and AstronomyHow do you find the converse of the perpendicular bisector theorem? The perpendicular bisector theorem states that any point on the perpendicular bisector is equidistant from both the endpoints of the line segment on which it is drawn.Perpendicular Bisector Theorem Converse Proof AC= BC. CD = CD(common) ∠ADC = ∠BDC = 90° How do you
Can I plant calla lilies outside?
Space and AstronomyCalla lilies are cold hardy and can be grown outdoors year-round, but you may keep them for several years as houseplants before they become too large. Over time, their leaves turn yellow and die back, making the plants look leggy. Do calla lilies come back every year? Many people treat their gift calla lilies as
What is spatial practice Lefebvre?
Space and AstronomySpatial Practice: Perceived space In his characteristic, if not confusing prose, Lefebvre describes this concept as: The spatial practice of a society secretes that space; it propounds and presupposes it, in a dialectical interaction; it produces it slowly and surely as it masters and appropriates it. What is Lefebvre spatial triad? The spatial Triad is
What is the functions minimum or maximum value?
Space and AstronomyFinding max/min: There are two ways to find the absolute maximum/minimum value for f(x) = ax2 + bx + c: Put the quadratic in standard form f(x) = a(x − h)2 + k, and the absolute maximum/minimum value is k and it occurs at x = h. If a > 0, then the parabola opens
Has anything been found on the moon?
Space and AstronomyBesides the 2019 Chinese rover Yutu-2, the only artificial objects on the Moon that are still in use are the retroreflectors for the lunar laser ranging experiments left there by the Apollo 11, 14, and 15 astronauts, and by the Soviet Union’s Lunokhod 1 and Lunokhod 2 missions. What has been discovered on the Moon?
What did Benjamin Banneker Discover?
Space and AstronomyIn 1752, Banneker garnered public acclaim by building a clock entirely out of wood. The clock, believed to be the first built in America, kept precise time for decades. In 1789, Banneker began making astronomical calculations that enabled him to successfully forecast a solar eclipse. What did Banneker Benjamin invent? In 1753, Banneker created his
What makes a sun?
Space and AstronomyThe Sun is a huge, glowing sphere of hot gas. Most of this gas is hydrogen (about 70%) and helium (about 28%). Carbon, nitrogen and oxygen make up 1.5% and the other 0.5% is made up of small amounts of many other elements such as neon, iron, silicon, magnesium and sulfur. How are suns created?
How many calculations can the IBM do in hidden figures?
Space and AstronomyThe IBM 7090 speed was described as “perform[ing] any of the following operations in one second: 229,000 additions or subtractions, 39,500 multiplications, or 32,700 divisions.” Needed more processing speed? How many calculations can the IBM do? How many calculations can the IBM do? The IBM can do 24,000 calculations. How many calculations per second can