How does an armillary sundial work?
Space and AstronomyIn use since Grecian times, armillaries are composed of complex, interlocking spheres supporting an arrow-shaped gnomon. As the sun travels across the sky, the gnomon casts a shadow onto a surface that indicates the hour. Armillary sundials are usually made of cast brass, bronze or aluminum. How do you set up an armillary sundial? Locate
What is perimeter and area for kids?
Space and AstronomyThe perimeter is the length around the outside of a polygon or the path that surrounds an area. This is different from the surface area. The surface area is how much surface is inside the polygon or space. How do you explain area and perimeter to a child? Video quote: Area is very different from
Who built the Hubble Space Telescope?
Space and AstronomyNASA’s immense Hubble space telescope launched on April 24, 1990. Lockheed Martin built the complex spacecraft at its facility in Sunnyvale, California. Did NASA create the Hubble telescope? First conceived in the 1940s and initially called the Large Space Telescope, the Hubble Space Telescope took decades of planning and research before it launched on April
What is an ogive in Excel?
Space and AstronomyAn ogive is a graph that shows how many data values lie above or below a certain value in a dataset. This tutorial explains how to create an ogive in Excel. What is an ogive graph? An ogive graph serves as a graphical representation of the cumulative relative frequency distribution for quantitative variables. In other
What is the difference between Calla and arum lily?
Space and AstronomyThere are a few ways to distinguish the two, however. Arum lilies belong to the Zantedeschia genus (of which Zantedeschia aethiopica, a white variety, is the most well known), and they are larger and have a more open, flat shape. Calla lilies, a part of the Calla genus, tend to be smaller and more tightly-wound.
Which children’s play kitchen is best?
Space and AstronomyThe Best Toy-Kitchen Sets on Amazon, According to Hyperenthusiastic Reviewers Step2 Fun With Friends Kids Play Kitchen. … Step2 Best Chef’s Kitchen Play Set. … Little Tikes Super Chef Kitchen. … Step2 Lifestyle Fresh Accents Kitchen. … KidKraft Ultimate Corner Play Kitchen With Lights & Sounds. … Little Tikes Cook N Grow Kitchen. Which kitchen
What is a compound Boolean expression?
Space and AstronomyCompound Boolean Expressions. Use to check multiple values in a single statement. Compound Boolean Expressions. resolve to a single True or False. What is compound Boolean expression in Python? You’ll typically use logical operators to build compound Boolean expressions, which are combinations of variables and values that produce a Boolean value as a result. In
Why does a solar eclipse occur?
Space and AstronomySometimes when the Moon orbits Earth, the Moon moves between the Sun and Earth. When this happens, the Moon blocks the light of the Sun from reaching Earth. This causes an eclipse of the Sun, or a solar eclipse. During a solar eclipse, the Moon casts a shadow onto Earth. Why do solar eclipses happen
What is a 4 inch caliper tree?
Space and AstronomyWhat does 4 caliper tree mean? Caliper is the diameter of the trunk, measured at 6 inches above the soil line, on trees that measure 4″ caliper or smaller. Over 4″ caliper trees are measured 1 foot from the soil line. Grade is a level of plant quality that meets minimum standards. What is a
How many enantiomers are there?
Space and Astronomytwo pairstwo pairs of enantiomers. Any given molecule has its enantiomer; the two other molecules are its diastereomers. How do you know how many enantiomers? If ‘n’ is even (here n is the number of chiral centres): Number of enantiomers=2n−1. Number of meso compounds=2n/2−1. Total number of optical isomers=2n−1+2n/2−1. If ‘n’ is odd: Number of