0
Two friends blow two whistles at the same time The first whistle makes a sound whose frequency is twice that of the sound made by the other whistle Which sound will reach you first?
Wiki User
∙ 14y ago
the higher one
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
Which scientist first measured the speed of sound and when?
As far as i know the first person to work out the speed of sound was Isaac Newton sometime in the 1600's. He worked it out from first principles. That is he worked it ot by using mathmatics and knowledge of air pressure and density. I don't know who first measured it and how.
Does a low pitch sound have a low frequency?
A sound wave, like any other wave, is introduced into a medium by a vibrating object. The vibrating object is the source of the disturbance that moves through the medium. The vibrating object that creates the disturbance could be the vocal cords of a person, the vibrating string and sound board of a guitar or violin, the vibrating tines of a tuning fork, or the vibrating diaphragm of a radio speaker. Regardless of what vibrating object is creating the sound wave, the particles of the medium through which the sound moves is vibrating in a back and forth motion at a given frequency. The frequency of a wave refers to how often the particles of the medium vibrate when a wave passes through the medium. The frequency of a wave is measured as the number of complete back-and-forth vibrations of a particle of the medium per unit of time. If a particle of air undergoes 1000 longitudinal vibrations in 2 seconds, then the frequency of the wave would be 500 vibrations per second. A commonly used unit for frequency is the Hertz (abbreviated Hz), where 1 Hertz = 1 vibration/second As a sound wave moves through a medium, each particle of the medium vibrates at the same frequency. This is sensible since each particle vibrates due to the motion of its nearest neighbor. The first particle of the medium begins vibrating, at say 500 Hz, and begins to set the second particle into vibrational motion at the same frequency of 500 Hz. The second particle begins vibrating at 500 Hz and thus sets the third particle of the medium into vibrational motion at 500 Hz. The process continues throughout the medium; each particle vibrates at the same frequency. And of course the frequency at which each particle vibrates is the same as the frequency of the original source of the sound wave. Subsequently, a guitar string vibrating at 500 Hz will set the air particles in the room vibrating at the same frequency of 500 Hz, which carries a sound signal to the ear of a listener, which is detected as a 500 Hz sound wave.
How does a sound wave for a high pitch noise differ to one of a low pitch noise?
Sound is the vibration of air molecules. The higher the pitch, the faster the vibration. The stronger the vibration, the louder the sound. Pitch is measured in Hertz (Hz). 1 Hertz means the molecule vibrates 1 time per second (back and forth), 10 Hz means 10 times per sec. etc. Humans hear sounds from 20 Hertz (very deep bass) to 20.000 Hertz (=20 kHz) (very high sizzling)
Why does high frequency equal low energy?
I will try to answer it as I just taught my son who is 11. This is not scientific but it's ok I think. The first thing is not to think of frequency as how often it occurs but instead how high the wave has to go to reach its mark. Like a roller coaster, when you go up the big hill its slow but long and high...then you go down and you slowly go up again to the high and back down. When you get to the short little hills that may have 6 or seven in a row they are fast and quickly one after another. This is how waves work. When a low frequency hits its mark, it hits fast and unrelenting and penetrates the object (like an xrays) but it has a short wavelength. When a high frequency signal hits its target it will hit strongly on the surface but not penetrate because its not pounding away at its target (the reason FM radio signal doesn't cause cancer) and it also has a longer longer wavelength. Fm Radio broadcasts in MHz....lower frequency, shorter wave length, higher energy. Am Radio broadcasts in Khz.....higher frequency, longer wave length, lower energy. For this reason. Fm radio wont make it too far out of an are but will get good reception inside a house or city. Am stations travel further but you lose the station when ever its hits something....like buildings. Hope these examples help...unless I'm wrong in which case my chem teacher will hate me and you are totally lost.
What has a 10 angstrom wavelength?
Lambda = wavelength = 1.0 Angstrom = 1.0 x 10-10 mf = frequencyc = speed of light (2.9979 x 108 m/s)*Use the following equation:c = lambda x f (lambda times f)*Rearrange the equation for frequency:f = c / (lambda) (c divided by lambda)= (2.99798 m/s) / (1.0 x 10-10 m/s)= [answer]
Which came first the mandolin or the tin whistle?
Mandolins evolved in the 17th and 18th centuries in the country of Italy. Tin-whistles were invented in 1843 in the country of England.
What are the use of whistle in first aid?
what is a whistle used for in first aid
Who uses the whistle in volleyball?
Whistles are used in volleyball, like most sports in two different situations. The most important is when officials use whistles during match play to control the match. The whistle is used to signal that an official has a signal that all players, coaches and other officials should see regarding the match. In volleyball, the two most important times are to signal the beginning of a play with the beckon to serve signal and after the play with the award of service signal (i.e. the team that won the rally, the point and the next service or if the play was game point, the victory.) But officials who are not the R1 (the "up ref") also use the whistle to signal faults that the R1 may not have a clear view or were screened. Some faults are also called by officials like the scorekeeper when the wrong player serves. Other times for the whistle are the start of the match and the conclusion of the match which precede the march-in and shake-hands signals repsecitvely. Simply put, with the lone exception of the beckon-to-serve signal, all time the whistle is blown, all play should stop. In all cases, the whistle precedes one or more signals. So one could think of the whistle as a command from an official to "look at me, I have something important to signal!" The other time whistles are involved in volleyball, is when a coach is using it in practice or warm-ups to communicate information or to draw attention from her or his players. Not all coaches use whistles, so this may or may not be present in any given player's experience.
Will a dog whistle to stop a dog from barking?
yes. But you have to train the dog to stop barking using a dog whistle first. I don't know how to do that as I'm not a proffesinal dog trainer.
What were the rugby referees first given in 1885?
Whistles
Is whistle a concrete noun?
Yes, "whistle" is a concrete noun because it refers to a physical object. It is something you can see and hold in your hand, making it tangible.
How do you spell the sound of a whistle at a girl?
This is called a "wolf whistle." There are a couple of spellings used, most particularly for drawn cartoons. One is "whoot whoo." The other is "wheet whoo" (wheet whew) indicating a higher, ascending pitch for the first half of the whistle, and a lower, descending pitch on the second.
When should a football referee blow the whistle?
A referee does not have to be in any specific position to blow the whistle; they could do it from anywhere they like, but obviously it will often be from somewhere near any foul that occurred or at least near the play at the time.
In Super Mario Advance 4 Super Mario Bros how do you get a golden whistle from world 1?
There are 2 whistles in world one: for the first one, go to level 3. at the end there are 5 big blocks. Stand on the middle one and crouch for ages. eventually you will fall behind the scenery. then run to the end of the level. Toadsworth will give you a whistle! Instead of getting the second one, just play on until you're in world 2. then blow the whistle and you can go to world 8! Hope this helped!
What did the soldiers in world war 1 use the whistle to communicate?
Officers used brass or nickel whistles to communicate to their soldiers in the heat of battle usually over machine gun fire and artillery fire. They would use the whistle at first to send the soldiers 'over the top' and then generally have signals like 2 blows for right and 1 for left according to how the battle was taking shape as well as if need be to signal retreat.
Where are the warp whistles in Super Mario 3?
The first is in Level 1-3, where you must duck on the white platform until you fall through. You will then run behind the black area into the secret Warp Whistle room. The next is in World 1-Fortress, where at the end of the level, you must fly up to the right until you fly off the screen. You then must walk to the right (you can't see your character), and enter the next Warp Whistle room.
When was the whistle invented?
Whistles made of bone or wood have been used for thousands of years for spiritual, practical, and, or entertainment purposes. A very distinctive whistle is the boatswain's pipe which was used aboard naval vessels to issue commands and salute dignitaries. The modern whistle has evolved from pipes used in ancient Greece and Rome to keep the stroke of galley slaves. There was also a medieval version that was used during the Crusades to assemble English crossbow men on deck for an attack. The model currently being produced by the Acme Whistle Company of Birmingham, England, was first manufactured in 1868 by the company's founder, Joseph Hudson. Modern Era of use began in 1878 via referee usage.
