What is union and intersection in set theory?
Space and AstronomyIn terms of set theory, union is the set of all the elements that are in either set, or in both, whereas intersection is the set of all distinct elements that belong to both the sets. The union of two sets A and B is symbolized as “A∪B”, whereas intersection of A and B is
What is the luminosity of a main sequence star?
Space and AstronomyThe luminosity and temperature of a main-sequence star are set by its mass. More massive means brighter and hotter. A ten solar mass star has about ten times the sun’s supply of nuclear energy. Its luminosity is 3000 times that of the sun. How do you find the luminosity of a main sequence star? When
What are cross sections in calculus?
Space and AstronomyWhat does cross-section mean in calculus? A cross section of a solid is a plane figure obtained by the intersection of that solid with a plane. The cross section of an object therefore represents an infinitesimal “slice” of a solid, and may be different depending on the orientation of the slicing plane. How do you
What is diameter kid definition?
Space and AstronomyKids Definition of diameter 1 : a straight line that runs from one side of a figure and passes through the center Measure the diameter of the circle. 2 : the distance through the center of an object from one side to the other : thickness the diameter of a tree trunk. diameter. What is
Why 5 is a rational number?
Space and AstronomyAnswer. 5 is a rational number because it can be expressed as the quotient of two integers: 5 ÷ 1. Related links: Is 5 a composite number? Is 5 a rational number? The number 5 is present in the real numbers. Therefore, the number 5 is a rational, whole, integer and real number. Is 5
What is a variable definition for kids?
Space and Astronomyvariable. • a quantity that can change or vary, taking on different values. What is variable in simple words? 1a : a quantity that may assume any one of a set of values. b : a symbol representing a variable. 2a : something that is variable. b : a factor in a scientific experiment that
Does the sun rotate the same direction as Earth?
Space and AstronomyThe Sun has a north and south pole, just as the Earth does, and rotates on its axis. … This is known as differential rotation. The Sun rotates in the same direction as Earth. Does the Sun rotate opposite of the Earth? The sun does indeed rotate, but it does not rotate like the Earth
Are all function a relation?
Space and AstronomyThe relation shows the relationship between INPUT and OUTPUT. Whereas, a function is a relation which derives one OUTPUT for each given INPUT. Note: All functions are relations, but not all relations are functions. Why all functions are relations? A function is a relationship between quantities where there is one output for every input. If
When did NASA desegregate bathrooms?
Space and Astronomy“Desegregation of bathroom and dining facilities happened gradually and quietly over the 1950s at Langley lab,” explains Barry. Who said here at NASA we all pee the same color? Al Harrison : Here at NASA we all pee the same color. When did NASA end segregation? 1958 That changed in 1958 when NACA was incorporated
What is the largest celestial object in the universe?
Space and Astronomythe Hercules-Corona Borealis Great WallHercules-Corona Borealis Great Wall. This is a ‘galactic filament’, a vast cluster of galaxies bound together by gravity, and it’s estimated to be about 10 billion light-years across! What are the largest and smallest celestial object in the universe? From largest to smallest they are: Universe, galaxy, solar system, star, planet,