One of Saturn\'s moons has an orbital distance of 1.87 times 10^2 m. The mean or
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One of Saturn's moons has an orbital distance of 1.87 times 10^2 m. The mean orbital period of this moon is approximately 23 hours. Use this information to estimate a mass for the planet Saturn. During a rain storm, rain comes straight down with a velocity V_i = -15 m/s and hits the roof of a car perpendicularly. The mass of the rain per second that strikes the roof is 0.060 Kg every second. Assuming that the rain comes to rest upon striking the car (V_1 = 0 m/m) find the average force exerted by the rain on the roof during a 3 second time Interval. A 1.5 kg object is pushed to the right with a net force of 60N. If a 5 kg object experiences the same acceleration, how much force is it being pushed with? On a hot summer day (30 degrees Celsius), a posky little mosquito produced its warning sound near your ear. The sound is produced by the beating of its wings at a rate of about 600 wing beats per sound. What is the frequency in Hertz of the sound wave? What is the wavelength of the wave? A man pushes a 50N box across a level floor at a constant speed of 2.0 m/s for 10 s Find the average power output by the man. A motorcyclist is trying 10 leap across a canyon by driving horizontally of the cliff that is 70.0 m high at 38.0 m/S Ignoring air resistance. use energy conservation to find the speed with which the cycle strikes the ground at a height of 35.0 m on the other side of the canyon You do not need to know how wide the canyon 1st In a serious accident, a nuclear power plant s reactor vessel cracks and all of the cooling water drains out. Although nuclear fission stops, radioactive decay continues to heat the reactor's 2.5 times 10^5 kg uranium core at a rate of 120 Mega-Watts. Once the core reaches its melting point, how much energy will it take to melt the core? How long will the molting take? Use the attached table.. What is a black hole? What is a singularity? If the earth had twice its present radius and twice its present mass, what would happen to your weight? Explain. What is the relationship between the radius of orbit of a satellite and its period ? A horse pulls on a create with a 1.000 N force, causing it to move at constant velocity What is the acceleration of the cart? A 44-kg child steps onto a scale What is the magnitude of the force that the scale exerts on the child? What is resonance? Discuss examples of how resonance can be useful and harmful Suppose in a restaurant your coffee is served about 5 or 10 minutes before you are ready for it If you want the coffee to be as hot as possible when you drink it. should you pour to the room temperature cream right away or when you are ready to drink the coffee? Advertisements for a toy ball once stated that it would rebound to a height greater than the height from which it was dropped Is this possible? Why or why not?Explanation / Answer
Resonance definition
The state of a system in which an abnormally large vibration is produced in response to an external stimulus, occurring when the frequency of the stimulus is the same, or nearly the same, as the natural vibration frequency of the system.
Music is all about resonance. When a string is plucked or otherwise stimulated it will sound at its resonant frequency. That is why piano or harp strings are all different lengths.
Brass and woodwind instruments also play at the frequency determined by the size of the resonating cavity which can be modified by opening or closing holes in it.
During WW2, soldiers marching in formation had to break step when they crossed a bridge because regular, rhythmic stimulus to the bridge could cause it to resonate or vibrate it and cause it to collapse.
Several years ago, there was a collapse inside a hotel ballroom. Numerous people were dancing on a raised walkway over the dance floor. The walkway collapsed because the music tempo was near the resonant frequency of it and the people's dance movements at that tempo or frequency caused it to sway and fail.
The power of resonance goes beyond shattering a glass or torturing eardrums with feedback; it can actually destroy large structures. There is an old folk saying that a cat can destroy a bridge if it walks across it in a certain way. This may or may not be true, but it is certainly conceivable that a group of soldiers marching across a bridge can cause it to crumble, even though it is capable of holding much more than their weight, if the rhythm of their synchronized footsteps resonates with the natural frequency of the bridge. For this reason, officers or sergeants typically order their troops to do something very unmilitary—to march out of step—when crossing a bridge.
The resonance between vibrations produced by wind and those of the structure itself brought down a powerful bridge in 1940, a highly dramatic illustration of physics in action that was captured on both still photographs and film. Located on Puget Sound near Seattle, Washington, the Tacoma Narrows Bridge was, at 2,800 ft (853 m) in length, the third-longest suspension bridge in the world. But on November 7, 1940, it gave way before winds of 42 mi (68 km) per hour.
It was not just the speed of these winds, but the fact that they produced oscillations of resonant frequency, that caused the bridge to twist and, ultimately, to crumble. In those few seconds of battle with the forces of nature, the bridge writhed and buckled until a large segment collapsed into the waters of Puget Sound. Fortunately, no one was killed, and a new, more stable bridge was later built in place of the one that had come to be known as "Galloping Gertie." The incident led to increased research and progress in understanding of aerodynamics, harmonic motion, and resonance.
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