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.
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
Description : Bats can also fly in dark because they are capable of taking the help of _____ A. Ultraviolet Waves B. Ultrasonic Waves C. Electromagnetic Waves D. Special Retina
Last Answer : ANSWER: B
Description : Bats can also fly in dark because they are capable of taking the help of -----? A. Ultraviolet Waves B. Ultrasonic Waves (Answer) C. Electromagnetic Waves D. Special Retina
Last Answer : B. Ultrasonic Waves (Answer)
Description : To hear distinct echo each time interval between original sound and reflected sound must be a)0.2sec b)1sec c)2sec d)0.1sec
Last Answer : d)0.1sec
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.
Description : Sound waves do not travel through _______. a) solids b)gases c)liquid d)vacuum
Last Answer : d)vacuum
Description : Explain how bats use ultrasonic waves to catch prey. -Science
Last Answer : Bats catch insects with the help of an advanced navigation system known as echolocation. They are known to emit high-frequency ultrasonic waves pitched at 20-100KHz. This is too high for the natural ... . These sounds get reflected when it hits different objects and reverts to the bats as echoes.
Description : The bats can fly in the dark because – (1) They can see the objects in darkness (2) They have weak legs and are likely to be attacked by predators (3) They generate flashes of light (4) They generate ultrasonic sound waves
Last Answer : (3) They generate flashes of light
Description : The bats can fly in the dark because (1) they can see the objects in darkness (2) they have weak legs and are likely to be attacked by predators (3) they generate flashes of light (4) they generate ultrasonic sound waves
Last Answer : they generate ultrasonic sound waves
Description : The speed of sound through air is ______ . a)330m/sec b)300 m/sec c)300 km/sec d)290 m/sec
Last Answer : a)330m/sec
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
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.
Last Answer : Audible wave
Description : The sound produced by a bat is– (1) audible (2) subsonic (3) infrasonic (4) ultrasonic
Last Answer : ultrasonic
Description : Radio waves, microwaves, infra-red spectrum, ultraviolet rays, X-rays and gamma rays are classified as ______. (1) light waves (2) electromagnetic waves (3) electric waves (4) magnetic waves
Last Answer : (2) electromagnetic waves Explanation: Electromagnetic radiation is the radiant energy released by certain electromagnetic processes. It consists of electromagnetic waves which are synchronized oscillations of electric and magnetic fields that propagate at the speed of light through a vacuum.
Description : Remote sensing techniques make use of the properties of ___________ emitted, reflected or diffracted by the sensed objects: (A) Electric waves (B) Sound waves (C) Electromagnetic waves (D) Wind waves
Last Answer : Answer: Option C
Description : When electromagnetic waves strike the boundary of denser medium they are __________. A. Reflected, in phase B. Reflected out of phase by 180° C. reflected, they are completely absorbed
Last Answer : B. Reflected out of phase by 180°
Description : Which of the following waves cannot be polarized? (1) Radio (2) Ultra violet (3) Infrared (4) Ultrasonic
Last Answer : (4) Ultrasonic Explanation: Only transverse waves (such as radio, ultraviolet and infrared waves) can be polarized since their vibrations can potentially occur in all directions perpendicular to the direction of travel. It is therefore possible to confine the vibrations to a single plane.
Description : The principle used in radar is the same as that of Sonar. In radar we use radio waves ; whereas in sonar we use ? A. red waves B. Infrared waves C. Ultrasonic (Answer) D. super sonic E. None of these
Last Answer : C. Ultrasonic (Answer)
Description : Which of the following waves cannot be polarised? (1) Radio (2) Ultra violet (3) Infrared (4) Ultrasonic
Last Answer : Ultrasonic
Description : Which phenomenon do bats or dolphins use to find prey, predators or obstacles? (1) Refraction of sound (2) Formation of beats (3) Scattering of sound (4) Echo location
Last Answer : (4) Echo location Explanation: Echolocation, also called biosonar, is the biological sonar used by several kinds of animals. Echolocating animals emit calls out to the environment and ... swiftlets in the genus Aerodramus (formerly Collocalia) and the unrelated Of bird Steatornis caripensis.
Description : Which phenomenon do bats or dolphins use to find prey, predators or obstacles ? (1) Refraction of sound (2) Formation of beats (3) Scattering of sound (4) Echo location
Last Answer : Echo location
Description : Why isn't the sound working on my Facebook?
Last Answer : What operating system and/or browser are you running Facebook on?
Description : How would you describe your genuine, full blown laugh?
Last Answer : Loud and very infectious ! !
Description : How do you pronounce 'H'?
Last Answer : Aytch.
Description : What sound does typing make?
Last Answer : I don’t really think there is anything else that sounds like typing, or if there is, it’s been long forgotten. It’s a pretty specific sort of sound.
Description : What do you hear when you open your windows at night?
Last Answer : answer:I hear geese. I live near a lake. There are horses on the other side of the street. Once in a while I will hear a horse. I will hear cars up the hill, too. At night there are not many cars at all, as I live on a rural route.
Description : What sounds do wolves make when happy?
Last Answer : Aren’t they renowned for howling?
Description : Where does sound go?
Last Answer : I would think that sound waves would be like a ripple in a lake - that they run their course, flatten out and die. But it's a good question. I would have the same question about light. If I shine a flashlight ... keep going? I have heard it said that it does, but if that is true, why can't I see it.
Description : Do temperature and humidity affect noise conductivity through air?
Last Answer : I live near a highway and I notice that fog (humidity+low temperature) seems to attenuate the noise. I also wonder if temperature differences sometimes bend the sound to pass over my house.
Description : What are the materials that reflect sound maximum? Could you mention all the materials used to reflect sound?
Last Answer : Sound reflection is best achieved with smooth, dense, non-porous materials. Sound dampening is best attained by soft, uneven, porous materials.
Description : What are some life tips for people who are sensitive to sound and vibration?
Last Answer : answer:Researcher for an academician LIbrarian Forest Ranger Gardener for a large estate
Description : Do you think the POTUS and FLOTUS mind being called that?
Last Answer : Is it just me, or are POTUS and FLOTUS a bit funky sounding? Funky as in cool or funky as in degrading? Personally I like the acronyms POTUS (though I never actually say it). I'm not seeing the ... caring/minding what they are called (POTUS/FLOTUS) since they know exactly who they are . I hope.;-)
Description : What funny/weird/interesting/lunatic observation have you made recently?
Last Answer : Whenever I try to be serious, everyone laughs Whenever I try to be funny, no one laughs
Description : Why can I not click on the volume icon in some Youtube videos?
Last Answer : answer:I haven’t encountered that. Do you have a link to the video?
Description : "W = double U". Why U and not V?
Last Answer : Because when the letter was written, both upper and lower case, it was round, not pointy. http://www.grundschulmaterial.de/inhalte/de/Klasse14/Deutsch/Klasse%201/Schreiblehrg%C3%A4nge/Nachspurbilder/Schreibschrift%20LAS/PRV-LAS-W-gr-19171.jpg
Description : How do I get the sound on the video for a Kodak Easy Share C1450 camera?
Last Answer : I can’t seem to get sound from the video.
Description : What do you think the growing hummm sounds heard through out the world are?
Last Answer : Well, there’s really only one explanation….
Description : My computer sometimes makes a sound, even when I set it to mute?
Last Answer : That sounds like a problem for sure. I would doubt it is a setting. And I don’t think it would matter if it was muted or not. I’ve never heard the “start” sound four times in a row or when it was not opening. Was it doing that before you played with the settings? did you try resetting the defaults?
Description : What is wrong with the system sounds on my laptop?
Last Answer : The volume controls have a mixer, and yours may be set up wonky. RIght-click your volume control in the taskbar and see if you didn’t turn down only the system sounds.
Description : What is your favorite loud sound?
Last Answer : I don’t think I have a favorite, but I do enjoy the sound of aircraft taking off. I guess I’m going to go with a space shuttle launching.
Description : Have you experienced a wonderful physical sensation recently, other than a visual one?
Last Answer : I went out into the middle of a cornfield in a heavy thunderstorm/high winds. That made my nipples hard. I was pelted with rain and absolutely soaking wet.
Description : Do we hear sounds differently from each other?
Last Answer : answer:It's hard to say what is cultural or learned, and what is innate hearing difference. I worked with a man who was born in China, and is a Chinese musician; much of what he plays and listens to is ... the voice of an angel, a friend relieved them of that error by saying yes, a Hell's Angel.
Description : Are you more likely to hear your upstairs neighbor than your downstairs neighbor?
Last Answer : answer:I lived in apartments for one year and while I often heard noise from upstairs, I don't ever remember hearing noise from downstairs. But then, I don't know if it was because my downstairs neighbour was ... >.< I didn't get any of those noises from downstairs but I'm sure they got mine.
Description : XBOX and HDTV help?
Last Answer : Think you need to connect an audio link ( a separate cable for audio ONLY ) check this out
Description : How would you describe the sound of your own laughter?
Last Answer : It’s horrifying, actually.
Description : How do they isolate a single sound source from a crowd?
Last Answer : It depends on how the audio master panned the sound when he or she was mixing it down as to how successful you might be with most over-the-counter equipment. What kind of recording equipment are you talking about?