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.Il Globe LTE 8359 PM @' H 39% U 6 12D I INPUTS (PERIODIC MOTION) IL" For Example: What is the beat frequency of the resultant wave if one of the wave has a frequency of 5000 Hz and the other one has 5030 Hz? f1 = 5000 Hz, f2 = 5030 Hz fbeat : lfl _f2l 9 fbeat : l 5000 HZ 5030 HZl fbeat : 30 HZ Resonance A property of any object if a certain resonance frequency is applied, it vibrates at most efficiency or it affects the object physically the most. That's why pendulums and playground swings works on a certain frequency of swinging. Resonance depends on physical properties of an object such as mass and tension. Finding the resonance frequency is important to identify the best working frequency of vibrating objects such as loud speakers for the best power to sound pressure efficiency, or for structural integrity to avoid common .l Globe LTE 8:59 PM @ 2 39% 12D | INPUTS (PERIODIC MOTION) FORCE AND MOTION LESSON 8 amplitude and waveform. Overtone can be described as pleasant to the sense of hearing because of the oneness different harmonic frequencies. Fundamental Fundamental 1 # Harmonic MAT Harmonic But if coexisting waves are not harmonious, it will result to a wave with a repetitive alternating change in amplitude caused Beat by interference among the combined waves. The frequency of amplitude changes is known as beats which is the difference between coexisting inharmonic frequencies as describe by the formula below. fbeat = I f1 - f2 | Where: f 1 is the frequency of the coexisting inharmonic frequency f2 is the frequency of the 2nd coexisting inharmonic frequency GENERAL PHYSICS 1 (TRACK 5) 8.u Globe LTE 3 8:59 PM @ '9' 39% a 6 12D I INPUTS (PERIODIC MOTION) IL" Sound travels at a certain speed which can be observed when the source of sound is quite far away such as when the lightning is observed first than its thunder during thunder storms. vs 2 331 m/S + 0. 6(T) Where: T is the temperature of air (in \"C) *for sounds which travels on air At normal conditions the sound travels at speeds of 343 m/s but may also depend on the kind of medium and its temperature where the sound travels expressed by the equation given at the right. For Example: How long it would take for a listener to receive the sound by a source situated 700 m away from the listener at which the ambient temperature is 27C? 1. Acquire the velocity of sound when the temperature of the medium is 27C. T = 2700 v3 = 331 m/s + 0.6(T) a v5 = 331 m/s + 0.6(2706) v5 = 347.2 m/S PROBLEM-SOLVING: Given the following situations below, read thoroughly the problem and identify what is asked. Provide your answers and solutions (final answers must be properly presented and highlighted) including the explanation (not exceeding to 3 sentences) on the following fields after each given item. UV-C is a type of ultraviolet radiation that can effectively eliminate microorganisms, it has a frequency of 1070 THz to 3000 THz. If your UV radiation source has a wavelength of 380 nm, will the radiation be effective as UV-C? Why or why not? Rubrics for Checking Short Essays (Explanations) 10 The provided idea is yet The correct and clear not clearly stated or No relevant idea was Content ideas were given there's an inclusion of found in the provided an incorrect explanation input The remaining 15 points will be allocated to the solutions B U Ty 99 E 0 / 200 Word Limit.Il Globe LTE 8359 PM @' H 38% U 6 12D I INPUTS (PERIODIC MOTION) IL" 2. Using the formula for velocity, transpose that to acquire time. T = 2706,12, = 347.2 m/s' 700m t _ _ 9 t = 2.02 S 347.2m/5 Sound can be described through its loudness, which is how much the vibrating object displace the medium in a specific area or in other words, the intensity of sound. Loudness can be measured in decibels (dB) or sound pressure level (SPL). For example, a normal conversation at a distance of one meter has a loudness of 60 dB and beyond 130 dB can inflict permanent damages on the sense of hearing. Large Event Sound System Nuclear Explosion Deafening The loudness of sound may depend on the amount, size, and power of the vibrating object. Frequency is a property of sound which is caused by how wave fronts are close together result of pitches or tones. .l Globe LTE 8:59 PM @ 2 39% 12D | INPUTS (PERIODIC MOTION) FORCE AND MOTION LESSON 8 Direction of Vibrations Direction of travel Compressed Decompressed Longitudinal Wave Sound is a form of energy perceived by our ears caused by any vibrating object which affects its neighboring medium such as air through compression and decompression. Our ears are designed to sense changes in the atmospheric pressure in a certain range of frequencies which our brain interpreted it as sound. Lighter regions are areas with less pressure, darker region areas of high pressure. GENERAL PHYSICS 1 (TRACK 5) 12.Il Globe LTE 8359 PM @' H 39% U 6 12D I INPUTS (PERIODIC MOTION) IL" In this particular problem, you are required to acquire the number of oscillations in the given duration where velocity and the wavelength are also given. 1. Acquire the frequency using the given wavelength and velocity of the wave. /1 = 0.2 m, U = 266 m/s 266 m/s 0.2 m E f Acquire the number of oscillations using the recently acquired frequency and relative duration of the number of oscillations. f=1330Hz,t=35 N=t>