Not bad, for kitty litter. But a civilization that does gain the ability to create relativistic kinetic-kill weapons becomes a deadly threat to any and all alien civilizations in range. I had this image of putting a relatively small payload on top of a bloody massive conventional booster and firing it of -- the poor mans R-bomb i guess -- but after looking at some calculations this doesn't look likely. From the kinetic energy equation and Tsiolkovsky's equation you get:
Fundamental Frequency and Harmonics As has been previously mentioned in this unit, a sound wave is created as a result of a vibrating object.
The vibrating object is the source of the disturbance that moves through the medium. The vibrating object that creates the disturbance could be the vocal cords of a person, the vibrating string and soundboard of a guitar or violin, the vibrating tines of a tuning fork, or the vibrating diaphragm of a radio speaker.
Any object that vibrates will create a sound. The sound could be musical or it could be noisy; but regardless of its quality, the sound wave is created by a vibrating object.
Nearly all objects, when hit or struck or plucked or strummed or somehow disturbed, will vibrate. If you drop a meter stick or pencil on the floor, it will begin to vibrate. If you pluck a guitar string, it will begin to vibrate. If you blow over the top of a pop bottle, the air inside will vibrate.
When each of these objects vibrates, they tend to vibrate at a particular frequency or a set of frequencies. The frequency or frequencies at which an object tends to vibrate with when hit, struck, plucked, strummed or somehow disturbed is known as the natural frequency of the object.
If the amplitudes of the vibrations are large enough and if natural frequency is within the human frequency rangethen the vibrating object will produce sound waves that are audible. All objects have a natural frequency or set of frequencies at which they vibrate. The quality or timbre of the sound produced by a vibrating object is dependent upon the natural frequencies of the sound waves produced by the objects.
Some objects tend to vibrate at a single frequency and they are often said to produce a pure tone. A flute tends to vibrate at a single frequency, producing a very pure tone.
Other objects vibrate and produce more complex waves with a set of frequencies that have a whole number mathematical relationship between them; these are said to produce a rich sound. A tuba tends to vibrate at a set of frequencies that are mathematically related by whole number ratios; it produces a rich tone.
Still other objects will vibrate at a set of multiple frequencies that have no simple mathematical relationship between them. These objects are not musical at all and the sounds that they create could be described as noise.
When a meter stick or pencil is dropped on the floor, it vibrates with a number of frequencies, producing a complex sound wave that is clanky and noisy. Factors Affecting the Natural Frequency The actual frequency at which an object will vibrate at is determined by a variety of factors.
Each of these factors will either affect the wavelength or the speed of the object.
The role of a musician is to control these variables in order to produce a given frequency from the instrument that is being played. Consider a guitar as an example. There are six strings, each having a different linear density the wider strings are more dense on a per meter basisa different tension which is controllable by the guitaristand a different length also controllable by the guitarist.
The speed at which waves move through the strings is dependent upon the properties of the medium - in this case the tightness tension of the string and the linear density of the strings. Changes in these properties would affect the natural frequency of the particular string.
The vibrating portion of a particular string can be shortened by pressing the string against one of the frets on the neck of the guitar. This modification in the length of the string would affect the wavelength of the wave and in turn the natural frequency at which a particular string vibrates at.
Controlling the speed and the wavelength in this manner allows a guitarist to control the natural frequencies of the vibrating object a string and thus produce the intended musical sounds. The same principles can be applied to any string instrument - whether it is the harp, harpsichord, violin or guitar.Poem of the Masses.
my smile melts with confusion artisticly enhanced she titty-danced her clients glanced at her mammarily-expansed bust, de-pantsed. mr_mond 1 year, 8 months ago I'm a PlayStation kid and then essentially stopped playing video games, so I never had any contact with Zelda – but I am very interested in rites of passage and how gender roles can interact with them, so I'm really enjoying Hyrule Haeresis.
QUESTION: I'm just confused because according to newton's third law of motion, " any action has an opposite but equal reaction", hence forces in nature are balanced, and balanced forces means bodies are at rest, so how .
Poem of the Masses. my smile melts with confusion artisticly enhanced she titty-danced her clients glanced at her mammarily-expansed bust, de-pantsed. Heroes and Villains - A little light reading. Here you will find a brief history of technology.
Initially inspired by the development of batteries, it covers technology in general and includes some interesting little known, or long forgotten, facts as well as a few myths about the development of technology, the science behind it, the context in which it occurred and the deeds of the many.
Apr 21, · I make sure the students understand the idea of adding water as it relates to the laws of motion. It seems that the ideal amount of water is about 1/3 of the bottle but encourage the kids to experiment.