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A wave has a frequency of 2.5Hz and a wave speed of 18ms.what is its wavelength?
Wiki User
∙ 7y ago
For any wave: speed = frequency x wavelengthIn this case, just divide the speed by the frequency, to get the wavelength.
Wiki User
∙ 7y ago
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What is the Approximate range of audible frequencies for most humans?
HIGHEST AUDIBLE FREQUENCY IS 25Hz..WHILE THE LOWEST AUDIBLE FREQUENCY IS 15Hz
Is 20 hz audible?
Yes, but barely. The sensitivity of human hearing falls rapidly at very low frequencies so there is no easily defined cut-off point. It becomes increasingly difficult to distinguish the pitch of pure tones as their frequency falls below about below 25Hz, and the sensation becomes more one of feeling rather than hearing; along those lines most people can "hear" down to 20Hz or lower.
What formula would be used to convert at current transformer rating at 60Hz to 25Hz?
I don't understand your question. Are you asking how to convert from 60hz to 25hz using a transformer? That cannot be done. Frequency in = frequency out.
What is the Approximate range of audible frequencies for most humans?
HIGHEST AUDIBLE FREQUENCY IS 25Hz..WHILE THE LOWEST AUDIBLE FREQUENCY IS 15Hz
Whether the sound produced by a seconds pendulum is infrasonic or ultrasonic?
Infrasonic denotes any sound that is at a frequency below the human capability of hearing, this is around 5-25Hz. Ultrasonic on the other hand is, conversely, a frequency that is above the human hearing range (over 20,000Hz).
What is a perfect harmonic of a 25Hz tone?
50, 75, 100
Given 220 volts 15 amperes 700 rpm and 0.8 ohms what speed will it run if a resistance is connected in series with supply voltage assume the motor is taking the same current?
Most probably, it won't even run or it will run for a while and then burn out, a motor that run 700rpm is an 8 pole induction motor, the only way to get it to run slower or faster is to change the supply frequency, say you want it to run at 350 rpm you have to change the supply frequency from 50Hz to 25Hz
What is the correct frequency for a 1080p blu ray player?
The television frame or field frequency will vary according to the content. It is the content that defines the frequency and not the hardware it plays on. In Europe, the field rate for 1080i signals is 50Hz with the frame rate at 25Hz. For 1080p, the frame and field rate are normally both 50Hz In North America, the rates are 30Hz and 60Hz respectively. There are some other rates that might rarely be seen. Commercial film production uses a frame rate of 24Hz and sometimes video conversions will capture at a 24Hz frame rate. For an HD capture, the full description will be 1080p, 24. Similarly, in Europe, film is often converted to video at 25 frames per second by increasing the playback speed of the film. The resulting video can then be 1080p, 25. Many Bluray and DVD players will simply output the video at the frame rate that is stored on disc rather than converting it to different rates.
Is 20 hz audible?
Yes, but barely. The sensitivity of human hearing falls rapidly at very low frequencies so there is no easily defined cut-off point. It becomes increasingly difficult to distinguish the pitch of pure tones as their frequency falls below about below 25Hz, and the sensation becomes more one of feeling rather than hearing; along those lines most people can "hear" down to 20Hz or lower.
What is the purpose of DSL filters on phone jacks in your house?
Regular telephone conversations use the lower section of the lines frequency range. depending on the company, voice is carried between 25hz and 3500hz. The DSL signal is carried from 10000hz to approx 3.5mhz, the 10000hz part is in the audible range, so without a filter you will hear a hiss or static on the telephone when you try to use it. Not only is this annoying but it interferes with the signal and will make your DSL go slower. Filters are very important.
What is the difference between PAL and NTSC?
PAL and NTSC are color encoding formats. NTSC is the format used in North America and PAL is used in Europe. Most other countries use one or the other. NTSC is normally used at a frame rate of 29.97Hz with 480 lines used for the image while PAL is normally 25Hz and uses 576 lines. The frame rate and line count are actually independent of the color encoding format used so there are instances where US frame rates and line counts can be used with PAL color encoding and vice versa. PAL and NTSC are similar formats but not interchangeable. Many modern televisions will now handle PAL and NTSC but that is not always the case.
What is the best hz rating on tv?
The native frequency of a television signal is 25Hz, 30Hz, 50 Hz or 60Hz, that is, an image refresh 25, 30, 50 or 60 times every second. Any television that features a faster refresh such as 100, 120, 200, 240 Hz is using a video processor to generate intermediate images to refresh the screen faster than the native signal would do. Some of the processors do a reasonable job while others don't show much improvement. Some will say that the processing actually makes for a lower quality image rather than higher. Before investing money in a television that offers high refresh rates, make sure you get to look at the image and decide for yourself whether it improves the image or not.
Why is the electrical frequency is 60 hertz or 50 hertz?
The frequency of 50 or 60 Hertz (cycles per second) was selected to reduce inductive power losses caused by long distance power line transmission. These fairly low frequencies still enable alternating current to be converted to various voltages and currents using moderate sized transformers at the point of power use. The higher the power frequency the higher the inductive losses over a length of power transmission line. For this reason frequencies higher than 60 Hertz are avoided. Where possible electrical power transmission over long distances these days is accomplished with high voltage direct current, which is converted to alternating current near the usage areas.
What the best Hz in TVs?
Hz or Hertz is a measure of frequency. It is used as a measure of all frequencies and not just those in television.Televisions use several separate images every second to give the impression of a moving image. In North America, a full image is displayed 30 times each second, so it is described as a 30Hz signal. However, the signal is delivered in two parts, one after the other, hence the same signal is also described as 60Hz, with 60 "fields" being shown each second.Some televisions boast 120Hz and even 240Hz operation. The signal delivered to the television is still 60Hz. The television takes the incoming signal and creates an intermediate image between each field. It does this by looking at the fields preceding and following the time of the intermediate field and then shows what it thinks would have been in the picture at that time. The idea is to provide a smoother picture with less flicker. Sometimes, the television does a good job of this conversion, sometimes it doesn't. It is vital to look at 120Hz and 240Hz televisions carefully to decide if the faster display rate actually improves the appearance of the image. Sometimes, it makes the image worse - hardly a good reason to invest more money into a television.In Europe, the frame frequency is 25Hz (or 50Hz for field rate). Therefore, the high frequency televisions will operate at 100Hz or 200Hz. The principle of operation is identical to the 60Hz signals.Regardless of some of the more outrageous claims by badly informed salesmen, broadcast signals are 60Hz or 50Hz. Broadcast signals are never higher than these rates and therefore, 100 or 120Hz televisions don't receive higher frequency signals than conventional televisions.Finally, while talking of frequencies, the 60Hz field rate in North America and other NTSC regions in fact is not quite 60Hz. Due to technical limitations way back in the 1950s, NTSC color signals were broadacst at 59.94 fields per second or 29.97 frames per second. Although the technology no longer needs this somewhat odd frequency, the 59.94Hz standard remains in place to this day. Therefore, any broadcast signal claiming to be a 60Hz signal in fact will be 59.94Hz.
