The term "infrasonic" applied to sound refers to sound waves below - (1) 200 Hz (2) 20000 Hz (3) 20 Hz (4) 0 Hz

The term "infrasonic" applied to sound refers to sound waves below - (1) 200 Hz (2) 20000 Hz (3) 20 Hz (4) 0 Hz
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(3) 20 Hz Explanation: The term "infrasonic" applied to sound refers to sound waves below the frequencies of audible sound, and nominally includes anything under 20Hz.
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Sound of frequency below 20 Hz is called ______. (1) audio sounds (2) infrasonic (3) ultrasonic (4) supersonics

Description : Sound of frequency below 20 Hz is called ______. (1) audio sounds (2) infrasonic (3) ultrasonic (4) supersonics

Last Answer : (2) infrasonic Explanation: The term "infrasonic" applied to sound refers to sound waves below the frequencies of audible sound and nominally includes anything under 20 Hz.

What are audible sound waves? (1) Having frequency less than 20 Hz (2) Having frequency between 20 Hz to 20000 Hz (3) Having frequency more than 20000 Hz (4) None of above

Description : What are audible sound waves? (1) Having frequency less than 20 Hz (2) Having frequency between 20 Hz to 20000 Hz (3) Having frequency more than 20000 Hz (4) None of above

Last Answer : (2) Having frequency between 20 Hz to 20000 Hz

Man perceives sound vibrations in the frequency ranges of – (1) 0 – 5 Hz (2) 6 - 10 Hz (3) 11 - 15 Hz (4) 20 - 20000 Hz

Description : Man perceives sound vibrations in the frequency ranges of – (1) 0 – 5 Hz (2) 6 - 10 Hz (3) 11 - 15 Hz (4) 20 - 20000 Hz

Last Answer : (4) 20 - 20000 Hz Explanation: The frequencies at which a human being can perceive sound vary between 20 Hertz and 20,000 Hertz. It is within these frequency ranges that people can communicate to each other and listen to music.

Man perceives sound vibrations in the frequency ranges of (1) 0 – 5 Hz (2) 6 – 10 Hz (3) 11 – 15 Hz (4) 20 – 20000 Hz

Description : Man perceives sound vibrations in the frequency ranges of (1) 0 – 5 Hz (2) 6 – 10 Hz (3) 11 – 15 Hz (4) 20 – 20000 Hz

Last Answer :  20 – 20000 Hz

Bats can sense obstacles because they produce – (1) supersonic sound waves (2) ultrasonic sound waves (3) infrasonic sound waves (4) micro sound waves

Description : Bats can sense obstacles because they produce – (1) supersonic sound waves (2) ultrasonic sound waves (3) infrasonic sound waves (4) micro sound waves

Last Answer : (2) ultrasonic sound waves Explanation: The reason that bats use ultrasound is because it has such a high frequency and it has a low diffraction or it bends less. They use this sound to do a ... come faster in a particular area than the rest of the sounds then they know that something is near.

Bats can sense obstacles because they produce (1) supersonic sound waves (2) ultrasonic sound waves (3) infrasonic sound waves (4) micro sound waves

Description : Bats can sense obstacles because they produce (1) supersonic sound waves (2) ultrasonic sound waves (3) infrasonic sound waves (4) micro sound waves

Last Answer : ultrasonic sound waves

Bats can sense obstacles because they produce – (1) supersonic sound waves (2) ultrasonic sound waves (3) infrasonic sound waves (4) micro sound waves

Description : Bats can sense obstacles because they produce – (1) supersonic sound waves (2) ultrasonic sound waves (3) infrasonic sound waves (4) micro sound waves

Last Answer : (2) ultrasonic sound waves Explanation: The reason that bats use ultrasound is because it has such a high frequency and it has a low diffraction or it bends less. They use this sound to do a ... come faster in a particular area than the rest of the sounds then they know that something is near.

A carrier signal has ______. A. Constant peak amplitude B. The information C. Frequency range 20-20000 Hz D. A varying amplitude

Description : A carrier signal has ______. A. Constant peak amplitude B. The information C. Frequency range 20-20000 Hz D. A varying amplitude

Last Answer : A. Constant peak amplitude

The sound produced by a bat is – (1) audible (2) subsonic (3) infrasonic (4) ultrasonic

Description : The sound produced by a bat is – (1) audible (2) subsonic (3) infrasonic (4) ultrasonic

Last Answer : (4) ultrasonic Explanation: Although bats use echolocation to detect their prey, and find their way around in the dark, the sounds which they emit are 'ultrasonic', which is another way of ... (audible) sound based on differences in physical properties, only the fact that humans cannot hear it.

The sound produced by a bat is– (1) audible (2) subsonic (3) infrasonic (4) ultrasonic

Description : The sound produced by a bat is– (1) audible (2) subsonic (3) infrasonic (4) ultrasonic

Last Answer : ultrasonic

Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is : (1) 1.0 (2) 1.2 (3) 1.5 (4) 2.0

Description : Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is : (1) 1.0 (2) 1.2 (3) 1.5 (4) 2.0

Last Answer : (1) 1.0 Explanation: Since the amplitudes, frequency and the speed of both the waves are in same, hence the wavelength of the composite wave will be the same as the single wave.

Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is : (1) 1.0 (2) 1.2 (3) 1.5 (4) 2.0

Description : Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is : (1) 1.0 (2) 1.2 (3) 1.5 (4) 2.0

Last Answer : 2mm

Bats detect the obstacles in their path by receiving the reflected ______. a) infrasonic waves c) ultrasonic waves b) electromagnetic waves d)radio waves

Description : Bats detect the obstacles in their path by receiving the reflected ______. a) infrasonic waves c) ultrasonic waves b) electromagnetic waves d)radio waves

Last Answer : c) ultrasonic waves

The frequency of a source of sound is 200 hz.How many Times does it vibrate in 2 min? -Physics

Description : The frequency of a source of sound is 200 hz.How many Times does it vibrate in 2 min? -Physics

Last Answer : Hence, the source vibrates 12000 times in a minute, producing a frequency of 00 Hz.

The CCITT standard bandwidth for speech is: (A) 20000 Hz (B) 15000 Hz (C) 7000 Hz (D) 3400 Hz

Description : The CCITT standard bandwidth for speech is: (A) 20000 Hz (B) 15000 Hz (C) 7000 Hz (D) 3400 Hz

Last Answer : (D) 3400 Hz

Sound of frequency below 20 Hz is called ______.

Description : Sound of frequency below 20 Hz is called ______.

Last Answer : Infrasonic

Sound of frequency below 20 Hz are called (a) Audio sounds (b) Infrasonics (c) Ultrasonics (d) Supersonics

Description : Sound of frequency below 20 Hz are called (a) Audio sounds (b) Infrasonics (c) Ultrasonics (d) Supersonics

Last Answer : Ans:(b)

A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an (1) Audible wave (2) Infrasonic wave (3) Ultrasonic wave (4) Microwave

Description : A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an (1) Audible wave (2) Infrasonic wave (3) Ultrasonic wave (4) Microwave

Last Answer : (1) Audible wave

A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an (1) Audible wave (2) Infrasonic wave (3) Ultrasonic wave (4) Microwave

Description : A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an (1) Audible wave (2) Infrasonic wave (3) Ultrasonic wave (4) Microwave

Last Answer : Audible wave

What is infrasonic or subsonic sound?

Description : What is infrasonic or subsonic sound?

Last Answer : Sounds of frequency below 20Hz are called infrasonic sound or subsonic sound.

The owl can see most clearly in total darkness because – (1) it has squint eyes (2) it has large eyes with orbs directed forward, giving it binocular sight (3) it has light bulbs in its eyes provided by nature (4) it produces infrasonic sounds

Description : The owl can see most clearly in total darkness because – (1) it has squint eyes (2) it has large eyes with orbs directed forward, giving it binocular sight (3) it has light bulbs in its eyes provided by nature (4) it produces infrasonic sounds

Last Answer : (2) it has large eyes with orbs directed forward, giving it binocular sight Explanation: Because of their eyes, an owl can see much better in the dark than we can. Owls have very large eyes which ... are able to see their prey in a three-dimensional manner. However, an owl's eye cannot rotate.

The owl can see most clearly in total darkness because (1) it has squint eyes (2) it has large eyes with orbs directed forward, giving it binocular sight (3) it has light bulbs in its eyes provided by nature (4) it produces infrasonic sounds

Description : The owl can see most clearly in total darkness because (1) it has squint eyes (2) it has large eyes with orbs directed forward, giving it binocular sight (3) it has light bulbs in its eyes provided by nature (4) it produces infrasonic sounds

Last Answer :  it has large eyes with orbs directed forward, giving it binocular sight

A transformer at 25 Hz develops 20 W hysteresis loss and 50 W eddy current loss. If the applied voltage and

Description : A transformer at 25 Hz develops 20 W hysteresis loss and 50 W eddy current loss. If the applied voltage and frequency are doubled, the new core losses are (A) 140 W (B) 180 W (C) 240 W (D) 480 W

Last Answer : A transformer at 25 Hz develops 20 W hysteresis loss and 50 W eddy current loss. If the applied voltage and frequency are doubled, the new core losses are 240 W

The frequency tolerance of an AM radio broadcast station A. 200 Hz B. 2000 Hz C. 20 Hz D. 2 Hz

Description : The frequency tolerance of an AM radio broadcast station A. 200 Hz B. 2000 Hz C. 20 Hz D. 2 Hz

Last Answer : C. 20 Hz

Fiber optic cables operate at frequencies near ∙ a. 20 MHz ∙ b. 200 MHz ∙ c. 2G Hz ∙ d. 800 THz

Description : Fiber optic cables operate at frequencies near ∙ a. 20 MHz ∙ b. 200 MHz ∙ c. 2G Hz ∙ d. 800 THz

Last Answer : ∙ d. 800 THz

The term "laminar flow" is most often associated with the description of: w) conduction of sound by waves x) current flow in transistors y) effects of viscosity of liquids z) passage of light rays through a liquid

Description : The term "laminar flow" is most often associated with the description of: w) conduction of sound by waves x) current flow in transistors y) effects of viscosity of liquids z) passage of light rays through a liquid

Last Answer : ANSWER: Y -- EFFECTS OF VISCOSITY OF LIQUIDS

Echo sounding is the technique applied to— (1) measure the depth of the sea (2) measure the amplitude of sound waves (3) record earthquake waves (4) record the density of air in the atmosphere

Description : Echo sounding is the technique applied to— (1) measure the depth of the sea (2) measure the amplitude of sound waves (3) record earthquake waves (4) record the density of air in the atmosphere

Last Answer : (1) measure the depth of the sea Explanation: Echo sounding is the technique of using sound pulses to find the depth of water. The interval from the emission of a pulse to reception ... information is then typically used for navigation purposes or in order to obtain depths for charting purposes.

Echo sounding is the tech-nique applied to— (1) measure the depth of the sea (2) measure the amplitude of sound waves (3) record earthquake waves (4) record the density of air in the atmosphere

Description : Echo sounding is the tech-nique applied to— (1) measure the depth of the sea (2) measure the amplitude of sound waves (3) record earthquake waves (4) record the density of air in the atmosphere

Last Answer :  measure the depth of the sea

A weight of 50 N is suspended from a spring of stiffness 4000N/m and subjected to a harmonic force of magnitude 60N and frequency 60 Hz. what will be the static displacement of the spring due to maximum applied force A. 0.015m B. 0.15 m C. 15 m D. 150m

Description : A weight of 50 N is suspended from a spring of stiffness 4000N/m and subjected to a harmonic force of magnitude 60N and frequency 60 Hz. what will be the static displacement of the spring due to maximum applied force A. 0.015m B. 0.15 m C. 15 m D. 150m

Last Answer : B. 0.15 m

A balanced three-phase, 50 Hz voltage is applied to a 3 phase, 4 pole, induction motor. When the motor is delivering rated output, the slip is found to be 0.05. The speed of the rotor m.m.f. relative to the rotor structure is (A) 1500 r.p.m. (B) 1425 r.p.m. (C) 25 r.p.m. (D) 75 r.p.m.

Description : A balanced three-phase, 50 Hz voltage is applied to a 3 phase, 4 pole, induction motor. When the motor is delivering rated output, the slip is found to be 0.05. The speed of the rotor m.m.f. relative to the rotor structure is (A) 1500 r.p.m. (B) 1425 r.p.m. (C) 25 r.p.m. (D) 75 r.p.m.

Last Answer : (D) 75 r.p.m.

If the fixed costs of a factory producing candles is Rs 20,000, selling price is Rs 30 per dozen candles and variable cost is Rs 1.5 per candle, what is the break-even quantity? (1) 20000 (2) 10000 (3) 15000 (4) 12000

Description : If the fixed costs of a factory producing candles is Rs 20,000, selling price is Rs 30 per dozen candles and variable cost is Rs 1.5 per candle, what is the break-even quantity? (1) 20000 (2) 10000 (3) 15000 (4) 12000

Last Answer : (1) 20000 Explanation: Breakeven quantity is the number of incremental units that the firm needs to sell to cover the cost of a marketing program or other type of investment. It is given by the formula: BEQ = FC / (P-VC) Where ... per unit = 30/12 = Rs. 2.5 So 20000/ (2.5-1.5) = 20000/1= Rs. 20,000

The sounds of which frequency are human beings most sensitive? A. 400 hertz B. 20 hertz C. 20000 hertz D. 5000 hertz (Answer)

Description : The sounds of which frequency are human beings most sensitive? A. 400 hertz B. 20 hertz C. 20000 hertz D. 5000 hertz (Answer)

Last Answer : D. 5000 hertz (Answer)

If the fixed costs of a factory producing candles is Rs 20,000, selling price is Rs 30 per dozen candles and variable cost is Rs 1.5 per candle, what is the break-even quantity? (1) 20000 (2) 10000 (3) 15000 (4) 12000

Description : If the fixed costs of a factory producing candles is Rs 20,000, selling price is Rs 30 per dozen candles and variable cost is Rs 1.5 per candle, what is the break-even quantity? (1) 20000 (2) 10000 (3) 15000 (4) 12000

Last Answer : 20000

Speed of sound in water is 1500 m s-1, depth of water when reflected sound waves are detected after 0.40 s is A. 700 m B. 600 km C. 600 m D. 750 km

Description : Speed of sound in water is 1500 m s-1, depth of water when reflected sound waves are detected after 0.40 s is A. 700 m B. 600 km C. 600 m D. 750 km

Last Answer : 600 m

A 3-phase, 11 kv, 50 Hz, 200 kW load has a power factor of 0.8 lag. ...

Description : A 3-phase, 11 kv, 50 Hz, 200 kW load has a power factor of 0.8 lag. A delta connected 3-phase capacitor is used to improve the power factor to unity. The capacitance perphase of the capacitor in micro-farads is?

Last Answer : A 3-phase, 11 kv, 50 Hz, 200 kW load has a power factor of 0.8 lag. A delta connected 3-phase capacitor is used to improve the power factor to unity. The capacitance perphase of the capacitor in micro-farads is 1.316.

The owl can see most clearly in total darkness because – (1) it has squint eyes (2) it has large eyes with orbs directed forward, giving it binocular sight (3) it has light bulbs in its eyes provided by nature (4) it produces infrasonic sounds

Description : The owl can see most clearly in total darkness because – (1) it has squint eyes (2) it has large eyes with orbs directed forward, giving it binocular sight (3) it has light bulbs in its eyes provided by nature (4) it produces infrasonic sounds

Last Answer : (2) it has large eyes with orbs directed forward, giving it binocular sight Explanation: Because of their eyes, an owl can see much better in the dark than we can. Owls have very large eyes which ... are able to see their prey in a three-dimensional manner. However, an owl's eye cannot rotate.

The term API refers to (1) Application Program Interface (2) Application Program Interaction (3) Applied Program Interaction (4) Application Process Interface

Description : The term API refers to (1) Application Program Interface (2) Application Program Interaction (3) Applied Program Interaction (4) Application Process Interface

Last Answer : Application Program Interface

High quality music only needs frequencies up to A. 10 Hz B. 15 Hz C. 20 kHzD. 15 kHz

Description :  High quality music only needs frequencies up to A. 10 Hz B. 15 Hz C. 20 kHz D. 15 kHz

Last Answer : D. 15 kHz

Geodimeter is based on: (A) Propagation of modulated light waves (B) Propagation of infrared radiation (C) The visible light as carrier with frequency of the order of 5 × 1014 Hz (D) High frequency radio waves

Description : Geodimeter is based on: (A) Propagation of modulated light waves (B) Propagation of infrared radiation (C) The visible light as carrier with frequency of the order of 5 × 1014 Hz (D) High frequency radio waves

Last Answer : Answer: Option A

Two waves have frequency of 500 Hz. One is set at its maximum value whereas the other at zero. The phase

Description : Two waves have frequency of 500 Hz. One is set at its maximum value whereas the other at zero. The phase angle between them will be

Last Answer : Two waves have frequency of 500 Hz. One is set at its maximum value whereas the other at zero. The phase angle between them will be 90o

If the electricity represented by the wave form in 'B' were applied to the left side of the illustrated circuit, the output on the right side would be ____________. EL-0064 A. direct current with the top lead positive with repect to the lower lead B. direct current, half wave rectified with a ripple frequency of 60 hz C. direct current with the top lead negative with repect to the lower lead D. clipped to a value equal to the square root of 3 times the input voltage value

Description : If the electricity represented by the wave form in 'B' were applied to the left side of the illustrated circuit, the output on the right side would be ____________. EL-0064 A. direct current with the ... lower lead D. clipped to a value equal to the square root of 3 times the input voltage value

Last Answer : Answer: C

A balanced three-phase, 50 Hz voltage is applied to a 3 phase, 4 pole, induction motor. When the motor is ...

Description : A balanced three-phase, 50 Hz voltage is applied to a 3 phase, 4 pole, induction motor. When the motor is delivering rated output, the slip is found to be 0.05. The speed of the rotor m.m.f. relative to the rotor structure is: (A) 1500 r.p.m. (B) 1425 r.p.m. (C) 25 r.p.m. (D) 75 r.p.m

Last Answer : A balanced three-phase, 50 Hz voltage is applied to a 3 phase, 4 pole, induction motor. When the motor is delivering rated output, the slip is found to be 0.05. The speed of the rotor m.m.f. relative to the rotor structure is: 75 r.p.m

A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave?

Description : A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave?

Last Answer : A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will be of 5 Hz.

Refers to a continuous tone generated in a local exchange terminal through a combination of two frequencies 350 Hz, and 440 Hz. A. Busy tone B. Call waiting tone C. Dial tone D. Standard tone

Description : Refers to a continuous tone generated in a local exchange terminal through a combination of two frequencies 350 Hz, and 440 Hz. A. Busy tone B. Call waiting tone C. Dial tone D. Standard tone

Last Answer : B. Call waiting tone

Which of the answers listed below best completes the statement: The rate at which any part of a wave travels from one place to another determines the wave's: w) propagation velocity x) period y) amplitude z) frequency

Description : Which of the answers listed below best completes the statement: The rate at which any part of a wave travels from one place to another determines the wave's: w) propagation velocity x) period y) amplitude z) frequency

Last Answer : ANSWER: W -- PROPAGATION VELOCITY

A machine costs Rs. 20000 and its useful life is 8 years. The money is borrowed at 8% interest per annum. The capital recovery factor at 8% interest per annum for 8 years is 0.174. The annual equipment cost of the machine will be (A) Rs. 1740 (B) Rs. 3480 (C) Rs. 5220 (D) Rs. 6960

Description : A machine costs Rs. 20000 and its useful life is 8 years. The money is borrowed at 8% interest per annum. The capital recovery factor at 8% interest per annum for 8 years is 0.174. The annual equipment cost of the machine will be (A) Rs. 1740 (B) Rs. 3480 (C) Rs. 5220 (D) Rs. 6960

Last Answer : (B) Rs. 3480

If the gross returns from an enterprise are INR 30000 and the net returns INR 20000, the benefit cost ratio based on net gain would be a). 3.0 b). 2.0 c). 1.0 d). 1.5

Description : If the gross returns from an enterprise are INR 30000 and the net returns INR 20000, the benefit cost ratio based on net gain would be a). 3.0 b). 2.0 c). 1.0 d). 1.5

Last Answer : b). 2.0

Can sound waves generate heat? -Physics

Description : Can sound waves generate heat? -Physics

Last Answer : Yes, sound waves can generate heat. In fact, sound waves almost always generate a little bit of heat as they travel and almost always end up as heat when they are absorbed. Sound and heat are both ... Yelling at your soup does indeed warm it up, but the amount is far too small to be noticeable.

In which case sound waves are used ?

Description : In which case sound waves are used ?

Last Answer : : Some animals can hear the sound of non-verbal vibrations even if people do not hear it. Elephants communicate with each other by the sound of this vibration. This word can go ... distortion. Earthquakes and nuclear explosions cause these vibrations to vibrate and wreak havoc with strong shaking.