Physics question and answers for March 10, 2024
- Q What beat frequency will you hear if you place a 323 Hz tuning fork and 329 Hz tuning fork that are both vibrating near each other?A. 652 HzB. -6 HzC....
- Q A giant sea monster chases a deep sea submarine near the bottom of the North Atlantic. The submarine is moving at 30 m/s. The sea monster sends out a sonar...
- Q Which one of the following would increase the speed of a sound wave in air?a. increasing the temperature of the airb.increasing the frequency of the sound waveC.increasing the intensity level...
- Q A friend of yours is loudly singing a single note at 363 Hz while driving towards you at 15 m/s on aday when the speed of sound is 336m/s (you...
- Q The G string on a guitar is 49 cm long and has a fundamental frequency of 196 Hz. A guitarist can play different notes by pushing the string against various...
- Q When refraction of a wave occurs the __________of the wave changes.a. speedb. frequencyc. wavelengthd. period
- Q If you were to build a pipe organ with open-tube pipes spanning the range from 45 Hz to 16 kHz. The speed of sound in air is 343 m/s.Part A....
- Q For a particular pipe in a pipe-organ, it has been determined that the frequencies 552 Hz and 621 Hz are two adjacent natural frequencies. Using 343 m/s as the speed...
- Q Determine the intensity of a 120-dB sound. The intensity of the reference level required to determine the sound level is 1.0 x 10-12 W/m.
- Q A fireworks shell explodes H = 120 m above the ground, creating colorful sparks. (Figure 1). Part A. How much greater is the sound level of the explosion for a...
- Q Two submarines are underwater and traveling directly away from each other. Sub 1 has a speed of 12 m/s and sub 2 has a speed of 16 m/s. Sub 1...
- Q Which of the following can be true when playing the musical instrument harp?The shorter strings vibrate faster than the longer ones.The longer strings vibrate faster than the shorter ones.Both strings...
- Q A driver travels northbound on a highway at a speed of 35 m/s. A police car, driving southbound, at a speed of 33 m/s approaches with its siren of original...
- Q Define crescendoThe amount of volces and how they work in cooperation with each other in a plece of music.Refers to the pattern of which a plece of music is composed.To...
- Q As a train starts from rest and then accelerates down the track, coming toward me faster and faster, the speed of the sound waves coming toward me will be:Select one:a....
- Q Objects which share the same natural frequency will often set each other into vibrational motion when one is plucked, strummed, hit or otherwise disturbed. This phenomenon is known as a...
- Q All musical instruments have a natural frequency or set of natural frequencies at which they will vibrate; each frequency corresponds to a unique standing wave pattern.Select one:TrueFalse
- Q If a guitar string has a fundamental frequency of 250 Hz, what is the frequency of its third harmonic? Select one. a. 250 Hz b. 1000 Hz c. Any of...
- Q What is the approximate distance of a thunderstorm when you note a 6.2s delay between the flash of lightning and the sound of thunder? Assume the speed of sound in...
- Q The sitar, an Indian musical instrument, has a set of strings that vibrate and produce music, even though they are never touched by the player. These sympathetic strings are identical...
- Q If a person yells (as opposed to whispering), then it will cause.Select one:a. the pitch of the sound to be higherb. the speed of the sound to be fasterc. the...
- Q Oscar the Grouch drops Slimey into a mine shaft 200 m deep. If the temperature is 15.0C, how much time will elapse between the moment when the stone is released...
- Q 21. Which of the following is produced when you exceed the speed ofsound in air?A. BeatsB. Moire PatternsC. Doppler ShiftD. Sonic BoomE. Resonance
- Q A submarine releases a frequency of 15000Hz that bounces off an enemy vessel. If the returning wave has a frequency of 19000Hz, is the enemy ship moving toward or away...
- Q Kiss FM Radio broadcasts at 102.5 on the dial. This stands for 102.5 Megahertz or 102,500,000 Hz. Radio I waves travel at the speed of light, which is 3.0 x10...
- Q 5. The distance between the 3rd and 6th nodes (3 sections) on a standing wave of a tuning fork is 82 cm. If the frequency of the waves is 32Hz,...
- Q A open-closed pipe of length L has a fundamental frequency f.Which of the following changes would result in a new fundamental frequency that is higher (greater in value) than before.Increasing...
- Q In general, for the same frequency, a sound with larger amplitude (a) will have greater intensity and will be perceived as louder. (b) will have greater intensity and will be...
- Q Kirk saw the space shuttle take off from its launch pad. He heard the ignition blast 15 seconds later. The frequency of the sound wave produced by the engine blast...
- Q An eagle flying at 28 m/s emits a cry whose frequency is 370 Hz. A blackbird is moving in the same direction as the eagle at 11.32 m/s. (Assume the...
- Q If the fundamental frequency of a string is 13 Hz, what is:H2 =H3 =H4=H5 =
- Q 12. The volume knob on a radio varies the resistance on a line that goes to the speakers. At a low volume the resistance is 10,000 ohms. At a high...
- Q Find the minimum extra path travelled by wave from sources S?, S2 in order, for observer at P, to detect maximum intensity if two sources are generating sound waves at...
- Q The notes produced by a violin range infrequency from approximately 196 Hz to 2637Hz.Find the maximum wavelength in air pro-duced by this instrument when the speed ofsound in air is...
- Q An organ pipe open at both the ends is provided with a hole at the middle of the pipe. If speed of sound in air is 340 m/s and length...
- Q A source emitting the sound of frequency 400 Hz is tied to a string of length 1 m and rotated with an angular speed of 30 rad/s in the horizontal...
- Q A source of sound of frequency 300 Hz is moving rapidly toward a fixed wall with a velocity of 30 m/s. If the speed of sound is 330 m/s, then...
- Q The toadfish makes use of resonance in a closed tube to produce very loud sounds. The tube is its swim bladder, used as an amplifier. The sound level of this...
- Q Two loudspeakers in a 20C room emit 700 Hz sound waves along the x-axis.If the speakers are in phase, what is the smallest distance between the speakers for which the...
- Q Two strings are adjusted to vibrate at exactly 240 Hz. Then the tension in one string is increased slightly. Afterward, three beats per second are heard when the strings vibrate...
- Q A flute player hears four beats per second when she compares her note to a 659 Hz tuning fork (the note E). She can match the frequency of the tuning...
- Q A fighter jet is coming straight at you and speeding up. Likely it is above you, so you should be safe. Describe how the sound wave from the fighter jet...
- Q you know the distance between the road centerline (source of traffic noise) and receiver was 10m after scattered trees and Hight of receiver was 2m, Then the distance adjustment .........factor...
- Q A concert loudspeaker suspended high off the ground emits 29.0 W of sound power. A small microphone with a 0.700 cm area is 53.0 m from the speaker. What is...
- Q An avant-garde composer wants to use the Doppler effect in his new opera. As the soprano sings, he wants a large bat to fly toward her from the back of...
- Q A source emitting a sinusoidal sound wave of frequency 360 Hz travels towards a wall at a speed 30 m/s. What is the beat frequency perceived by an observer moving...
- Q On a hot summer day, the temperature of air in Arizona reaches 108F. What is the speed of sound in air at this temperature? (The speed of sound at 0C...
- Q An opera singer in a convertible sings a note at 600 Hz while cruising down the highway at 90 km/hr.What is the frequency heard by a person standing beside the...
- Q The sun emits electromagnetic waves with a powerof 4.0 x 1026 W.Determine the intensity of electromagnetic waves from the sun just outside the atmospheres of Venus.Determine the intensity of electromagnetic...
- Q A dolphin located in sea water at a temperature of 25C emits a sound directed toward the bottom of the ocean 235 m below. How much time passes before it...
- Q A loudspeaker at the origin emits a 120 Hz tone on a day when the speed of sound is 340 m/s. The phase difference between two points on the x-axis...
- Q A hammer taps on the end of a 5.0-m-long metal bar at room temperature. A microphone at the other end of the bar picks up two pulses of sound, one...
- Q Choose the CORRECT alternative regarding loudness and pitch of sound:Loudness is determined by the amplitude of sound and pitch by the frequency of sound.Loudness is determined by the frequency of...
- Q A bat locates insects by emitting ultrasonic "chirps" and then listening for echoes from the bugs. Suppose a bat chirp has a frequency of 25 kHz. In what direction would...
- Q The longest pipe found in most medium-size pipe organs is 5.20 m (17.1 ft) long. You may want to review (Page). For related problem-solving tips and strategies, you may want...
- Q A metal bar with a length of 1.00 m has a density of 6900 kg/m. Longitudinal sound waves travel from one end of the bar to the other in a...
- Q A 220 g mass attached to a horizontal spring oscillates at a frequency of 1.30 Hz. At t = 0s, the mass is at z = 4.80 cm and has...
- Q An intensity of 1.0 W/m is often used as the "threshold of pain". How much closer to the source can you move before the sound intensity reaches this threshold? Express...
- Q A 5.02-m, 0.736-kg wire is used to support two uniform 239- N posts of equal length . Assume that the wire is essentially horizontal and that the speed of sound...
- Q A stationary police car emits a sound of frequency 1200 Hz that bounces off of a car on the highway and returns with a frequency of 1280 Hz. The police...
- Q While sitting in your car by the side of a country road, you see your friend, who happens to have an identical car with an identical horn, approaching you. You...
- Q While traveling down the road at 55 mph, you pass a fire station where the siren is blowing.Which of the following observations is attributable to the Doppler Effect?Select one: a....
- Q A platinum wire that is 1.20 m long has a radius of 0.500 mm and is fixed at both ends. In its third harmonic it vibrates at 512 Hz. What...
- Q A police siren has a frequency of 550 Hz as the police car approaches you, 450 Hz after it has passed you and is receding. How fast are the police...
- Q If a submarine's sonar can measure echo times with a precision of 0.0104 s, what is the smallest difference in distances in meters it can detect? Assume the speed of...
- Q How long must a flute be in order to have a fundamental frequency of 262 Hz (this frequency corresponds to middle C on the evenly tempered chromatic scale on a...
- Q A metal block is volume expansion coefficient y kept on rigid horizontal surface as shown in figure Initially temperature of the block is same as the surrounding Now AQ amount...
- Q Two strings of the same length but different mass per unit length are used to suspend a rod whose density varies as p po 1 ax as shown in the...
- Q A sphere made of polymer is floating on the surface of water which is at a temperature of 20 C and 1 of the volume of the sphere is above...
- Q A barometer gives correct reading at any temparature and coefficient of linear expansi scale glass tube are a b and coefficient of real expansion of mercury is c Then 1...
- Q Two rods of same mass are made up of different materials having specific heat in the ratio 3 4 and coefficient of linear expansins in the ratio 2 5 When...
- Q The ends of the bars shown in the figure are 5 mm apart at 25 C The left hand bar is brass and is 1 00 m long and the...
- Q he temperature of a disk made of a certain metal is increased to 100C The radius of said disk increased by 0 22 Calculate the percentage increase of 1 The...
- Q Stress strain graph for a metallic wire is shown at four different temperatures T T T3 and T4 Choose the correct option Stress T 1 O T T2 T3 T4...
- Q Variation of radiant energy emitted by sun filament of tungsten lamp and welding arc as a function of its wavelength is shown in figure Find t correct match option from...
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