Physics question and answers for March 16, 2024
- Q A new antiterrorist technique detects the differences in electromagnetic waves emitted by humans and by weapons made of metal, plastic, or ceramic. One possible range of wavelengths used with this...
- Q Commercial trucks cause about 18,000 lane-change and merging accidents per year in the United States. To prevent many of them, a warning system covering blind spots is being developed. The...
- Q III Go to Two Source Interference tab.1) What happens when you move the man back and forth? Why?2) What happens to the sound when there are two sources?3) What type(s)...
- Q Sound waves Select one: a. are longitudinal waves. b. are transverse waves. c. are a part of the electromagnetic spectrum. d. do not require a medium for transmission.
- Q Suppose you set your watch by the sound of the noon whistle from a factory 3km away. Compared to the correct time, your watch will be behind. Select one: True...
- Q Consider the diagram below of several circular waves created at various times and locations. The diagram illustratesSelect one:a. refractionb. interferencec, a sonic boomd. the Doppler effect
- Q As two or more waves pass simultaneously through the same region, ____ can occur. Select one: a. reflection b. diffraction e. interference d. refraction
- Q An emergency vehicle has its siren on and is moving east along Shea Blvd at a constant speed. Samantha is riding her bicycle west along Shea Blvd at a constant...
- Q An object is vibrating at its natural frequency. Repeated and periodic vibrations of the same natural frequency impinge upon the vibrating object and the amplitude of its vibrations are observed...
- Q The frequency of wave A is 250 hertz and the wavelength is 30 centimeters. The frequency of wave B is 260 hertz and the wavelength is 25 centimeters. What is...
- Q When comparing the wave characteristics of a wave in two different ropes, one can be sure that the wavelength and speed will beSelect one:a. smallest in the least dense mediumb....
- Q Consider Diagram A and Diagram B below:Compared to the wave in Diagram B, the wave in Diagram A hasSelect one:a. a smaller amplitude and the same wavelengthb. the same amplitude...
- Q An elastic rope is tied securely to a wall. An upward-displaced pulse is introduced into the rope. The pulse travels through the rope, reaches the boundary with the wall and...
- Q Match the following wave quantities to the mini-definition.How fast the wave moves through the medium.How long the wave is.How often the particles vibrate about their fixed position.How much time it...
- Q Refracted sound that bends away from the normal is sound that hasSelect one:a. slowed down.b. nearly been absorbed.c. diffracted.d. speeded up.
- Q A wave is present in a slinky. A coil of the slinky makes 12 complete up and down cycles of vibration in a total time of 4 seconds. The period...
- Q How long is the wavelength of KAJA radio whose broadcast frequency is 97.1 MHz? (97.1 MHz -97,100,000 Hz and v =300,000,000 m
- Q The two pulses shown at the right are moving in opposite directions along the same medium.When they meet,__ interference will occur.Select one:a. dopplerb. resonantc. destructived. constructive
- Q Two waves meet and interfere constructively. Which one of the following factors increases?Select one:a. amplitudeb. periodc. frequencyd. wavelength
- Q The diagram above represents two pulse waves moving toward each other through a medium. The two waves will exactly coincide when they reach point A. At point A, the amplitude...
- Q What behavior occurs when a crest of one wave meets a crest of a second wave while moving along the same medium?Select one:a. The Doppler effectb. Resonance.c. Destructive interferenced. Constructive...
- Q A wave is introduced into a coiled Slinky. A crest on the wave is observed to move a relatively long distance in a short amount of time. This observation would...
- Q In a standing wave on a vibrating string, a point that appears to remain stationary is a[n]Select one:a. antinode.b. node.c. point of constructive interference.d. rarefaction.
- Q A wave pattern on a stretched string appears to be stationary. This wave pattern is an example of aSelect one:a. longitudinal wave.b. standing wave.c. non-periodic wave.d. pulse wave.
- Q The diagram above represents a certain standing wave on a vibrating string. This standing wave hasSelect one:a. 2 nodes and 3 antinodes.b. nodes and 4 antinodes.c. 3 nodes and 2...
- Q A wave is introduced into a thin wire held tight at each end. It has an amplitude of 3.8 cm, a frequency of 51.2 Hz and a distance from a...
- Q As you've learned, several phrases can be used to describe wave motion. Such phrases include how often, how much time, how fast, how high, and how long. Which of these...
- Q A periodic and repeating disturbance in a lake creates waves that emanate outward from its source to produce circular wave patterns. If the frequency of the source is 8.7 Hz...
- Q One difference between the light waves coming from a light bulb and water waves on a pond is that(a) light waves occur in three dimensions while water waves occur in...
- Q A standing wave is formed when a wave reflects back on itself.What would be true of the parts of this standing wave that are in between the red dots (the...
- Q The displacement of a spring vibrating in damped harmonic motion is given by the following equation. Find the first four times when the spring is at its equilibrium position, y...
- Q 17. Pitch corresponds toa) Frequencyb) Noisec) Loudnessd) Wavelengthe) Both b and c
- Q A string is attached to a vibrator as shown and a standing wave is set up by adjusting the frequency of oscillation. The mass per unit length of the string...
- Q 1Does an infrared wave or an x-ray travel faster in the vacuum of space?A. The infrared wave travels faster.B. The x-ray travels faster.C. Both waves travel at the same speed.D....
- Q 13. If a sound source has a power of 8W and you observe an intensity of 0.08 W/m, how far are you from the source?A submarine releases a frequency of...
- Q A child in an inner tube is bobbing up and down in the ocean and notices that after a wave crest passes, four more crests pass in a time of...
- Q A positive pulse is sent along a spring. A short time later, a negative pulse with a smaller amplitude returns. Assuming there are no frictional losses, which of the following...
- Q A car horn is located due north of where you are standing. The sound transmitted to your ears is caused by air particles moving: a) in a vertical and horizontal...
- Q A standing wave is generated in a string so that 3 loops are present. The length of the string is 15 m and the frequency of the source is 2.5...
- Q What equation directly relates wavelength to frequency? A. E = hc/?B. c = ?xf C. E = ?mc^2 D. q = mc?T
- Q A taut string, 80 cm long and tied at both the ends has only resonance frequencies 160 Hz, 200 Hz and 240 Hz between 150 Hz to 250 Hz. What...
- Q Suppose that it take 0.6 seconds for a mass on a spring to move from its highest position toits lowest position. What is the period (T) of the spring?O 0.3...
- Q 2. A cord with linear mass density 14 g/m carries a traveling transverse wave moving in the +x- direction. The transverse displacement of the cord at any position x along...
- Q Two coherent harmonic waves travelling on a string in same direction have amplitudes equal to 2.5 mm each. The resultant wave has an amplitude of 3 mm. Find the phase...
- Q A housing attached to a microprocessor uses radiator fins to get rid of excess heat. If the largest amount of radiation emitted by the fins has a frequency of 244.75...
- Q Cell phones send signals in the microwave band of the electromagnetic spectrum. If a geosynchronous satellite for relaying cell signals is located 3.5x107m above the Earth's surface, how long does...
- Q In one or two sentences describe how the frequencies of the different harmonic patterns are related to each other. Why is the word fundamental chosen as another name for the...
- Q The two highest-pitch strings on a violin are tuned to 440 Hz (the A string) and 679 Hz (the E string).What is the ratio of the mass of the A...
- Q A cork is floating in the water 20 meters from the shore of a lake. No wind is blowing, but waves from a passing boat are moving directly toward the...
- Q A progressive transverse sine wave is passing through a string held along x axis. Consider a small element of the string. Choose the correct statement(s): The element executes SHM in...
- Q Two sound waves of the same amplitude, but opposite orientation, interfere with each other. This type of interference is called:Select one:a. interventionb. negative superpositionc. constructived. destructive
- Q Which of the following are examples of resonance? Check all that apply.a. Running up and down the stairsb.Swinging in a playground swingc.Organ pipesd. Gently tapping a drinking glass
- Q The displacement of a wave traveling in the positive x-direction is D(x, t) = (3.5cm)sin (2.2x - 124t), where x is in m and t is in s. What is...
- Q The wave speed on a string is 145 m/s when the tension is 82.0 N.What tension will give a speed of 183 m/s? Express your answer with the appropriate units.
- Q The displacement of a wave traveling in the negative y-direction is D(y, t) = (5.90 cm) sin(6.20 y 63.0 t ), where y is in m and it is in...
- Q A friend of yours is loudly singing a single note at 402 Hz while racing toward you at 24.4 m/s on a day when the speed of sound is 340...
- Q The sound intensity level 5.0 m from a large power saw is 100 dB.At what distance will the sound be a more tolerable 80 dB?
- Q You are generating traveling waves on a stretched string by wiggling one end. If you suddenly begin to wiggle more rapidly without appreciably affecting the tension, you will cause the...
- Q Two longitudinal pressure waves are in a state of superposition. At one instant, at the point ofintersection, is a crest of amplitude 22.4 dB, and the other is a trough...
- Q What is the result of an incident wave being perfectly out of phase with a reflected wave?Select one: a. a standing wave is formed b. destructive interference eliminates the wave...
- Q In an X-Y Cartesian graph, if a transverse wave travels in the positive x direction, whichdirection could the medium move?Select one or more:a. negative y directionb.positive y directionc. negative x...
- Q In a young's double slit experiment, the distance between the two slits is 0.1mm and the wavelength of light used is 410^-7 m.lf the width of the fringe on the...
- Q What is meant by harmonics? Show that only odd harmonics are present as overtones in thecase of an air column vibrating in a pipe closed at one end.The wavelengths of...
- Q A factory siren indicating the end of a shift has a frequency of 90.0 Hz. The speed of sound is 343 m/s. What frequency is perceived by the occupant of...
- Q If a transverse wave is created in a medium that extends horizontally from left to right, then the particles of the medium will vibrate in a direction.A. diagonal (both horizontal...
- Q A commuter train blows its 200-Hz horn as it approaches a crossing. The speed of sound is 333 m/s. (a) An observer waiting at the crossing receives a frequency of...
- Q Why does the air in the surroundings move toward the eye of a tropical cyclone?A. because that is the center so air in the surroundings move toward itB. because it...
- Q A sound source S moves with speed of 20 m s with respect to the medium There are two detectors A B located as shown in figure If wavelength emitted...
- Q The diagram above shows the basic idea behind a disk siren It consists of a disk in which there are 16 equally spaced holes all at the same distance from...
- Q A wall is moving with velocity u and a source of sound frequency f moves with velocity same direction as shown Assuming that the sound travels with a speed of...
- Q A man is riding a vehicle towards a vertical cliff with a velocity of 36 km h He fires a gunshot and hears its echo after 4 sec The speed...
- Q A small source S of mass m starts moving with velocity 40 m s towards a detector D of same mass m on a frictionless surface AB as shown in...
- Q A pipe open at both ends has a fundamental frequency f in air The pipe is dipped vertically in water so that 3 4th of it is in water The...
- Q One end of 12 0 m long rubber tube with a total mass of 0 9 kg is fastened to a fixed support A cord attached to the other end...
- Q Question No 25 A stationary source is emitting sound at a fixed frequency fo which is reflected by two cars approaching the source The difference between the frequencies of sound...
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