What is a density wave and how is it defined?
Space and Astronomy[′den·səd·ē ‚wāv] (physics) A sound wave or other type of material wave which causes the density of the matter through which it passes to alternately rise above and drop below its mean value. What is meant by a density wave? “A density wave is shorthand to describe the way stars in a galaxy are packed
What does m4 bolt size mean?
Space and AstronomyM4 = 4mm dia, uses 3mm allen key. Except the thread size doesn’t define the size of the tool used – I have M5 bolts which take a 3mm AK (not to mention those with screwdriver slots). Posted 10 years ago. What size is an M4 bolt? Table 3. Metric Closest Inch M3-0.5 4-48 (Smaller)
What would you see inside a spherical mirror?
Space and AstronomyWhat would you see if you were inside a spherical mirror? Since you are at the center of curvature of the sphere, the image from one half of the sphere would generate an image directly onto the surface of the other half. Due to this placement, the new image would be infinitely magnified, covering everything
What do you mean by optical rotation?
Space and AstronomyOptical rotation, also known as polarization rotation or circular birefringence, is the rotation of the orientation of the plane of polarization about the optical axis of linearly polarized light as it travels through certain materials. What is optical rotation with example? Optical Rotation Theory Substances that have the ability to rotate the plane of the
Who is the protagonist in the rising of the moon by Lady Gregory?
Space and AstronomyWho is the protagonist in The Rising of the Moon? The Ragged man is an interesting character of the one act play “The rising of the moon” written by Lady Gregory. He is a rebel of heroic qualities. He is a clever man, a true leader, a psychoanalyst, a true patriot and a passionate lover
What countries have soft landed on the moon?
Space and AstronomyUncrewed landings In 1966, the USSR accomplished the first soft landings and took the first pictures from the lunar surface during the Luna 9 and Luna 13 missions. The U.S. followed with five uncrewed Surveyor soft landings. What countries have landed objects on the moon? Missions to the Moon have been conducted by the following
How many stereoisomers does 1/2 Dimethylcyclobutane have?
Space and AstronomyHow many stereoisomers are possible for Dimethylcyclobutane? To sum up, there are three isomers of 2,3-dimethylcyclobutane, a single cis isomer, and two enantiomeric trans isomers. The plane of symmetry is relatively easy to find and is the most common one to look for, but one other element of symmetry also guarantees an achiral molecule, and
What is the line of reflection?
Space and Astronomyline of reflection. • a line midway between something, called a pre-image, and its mirror reflection. How do you find the line of reflection? Take any point from the first line(The line which is being reflected). And then find a point such that the line(in which the reflection has to be seen) should bisect the
What does this symbol mean in math v?
Space and AstronomyWhile there are more sophisticated meanings in higher mathematics, most of the time you will see the inverted v it means the operation “to the power of.” For example, 5^2 is 5 to the power of 2, or 5 squared, which is 5×5=25. If you see 4^3 it is 4 to the power (or exponent)
How many atmospheres does the sun have?
Space and AstronomyThe sun’s atmosphere: Photosphere, chromosphere and corona. Does the Sun have atmosphere? The photosphere, chromosphere, and corona are all part of the Sun’s atmosphere. (The corona is sometimes casually referred to as “the Sun’s atmosphere,” but it is actually the Sun’s upper atmosphere.) The Sun’s atmosphere is where we see features such as sunspots, coronal