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Do I need to convert the unit of frequency if it is in GHz to calculate wave speed

Calculate the speed of a wave that has a frequency of 3 GHz and a wavelength of 4mm

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To avoid mistakes due to faulty conversions, you must use SI units.
4 mm =4*10^-3 m
3 GHz=3* 10^9 Hz=3* 10^9 (s^-1)
Your result will be in m/s

Posted on Nov 28, 2013

  • k24674 Nov 28, 2013

    v=lambda*f=(4*10^-3)*(3*10^9) =1.2*10^7 m/s


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Calculate the speed of the wave that has a frequency of 3 GHz and a wavelength of 4mm

For a plane wave in a homogeneous medium, the phase velocity of the wave is related to the frequency and the wavelength by the relation
velocity = wave_length*frequency
In this case
velocity (in m/s)=(4*10^-3 m )*(3*10^9 s^-1)=12*10^(9-3)=12*10^6
Thus velocity=1.2*10^7 m/s

Nov 28, 2013 | Office Equipment & Supplies

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What is the sorce of radiowaves

Radio waves are electromagnetic waves occurring on the radio frequency portion of the electromagnetic spectrum, with the range of about 3 Hz to 300 GHz.

Like all electromagnetic waves, radio waves are produced by exited electrons when they return to their normal state. Radio waves can be made to carry information by varying a combination of the amplitude, frequency and phase of the wave within a frequency band.

When electromagnetic radiation impinges upon a conductor, it couples to the conductor, travels along it, and induces an electric current on the surface of that conductor by exciting the electrons of the conducting material. This effect (the skin effect) is used in antennas. Electromagnetic radiation may also cause certain molecules to absorb energy and thus to heat up; this is exploited in microwave ovens. Source(s): wikipedia

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Where is the location of the speed sensor on the 1999 v10 triton f250? Why does my speedo not work?

VSS Sensor The Vehicle Speed (VSS) Sensor input is used by the PCM to determine vehicle speed. The VSS generates a signal that increases in frequency proportionate to vehicle speed. The PCM has a base frequency stored in memory for a distance of one mile. By comparing the input and stored value, the PCM calculates vehicle speed.
VSS types include: photo-optic, permanent magnet generators or hall effect technology. The PCM may use other sensors on the vehicle (ABS Wheel Speed) to validate VSS operation.
VSS information is used to calculate vehicle loads including: torque converter application, cruise control, fuel cutoff/speed governance strategies, instrument panel speedometer and more.
Modified drivetrain components such as final gear sets and/or tires can alter VSS input values to the PCM. Improper signals can alter Torque Converter Clutch (TCC) application, shift points, cruise control operation as well as many other systems relying on vehicle speed input.
Typical VSS comp-00-00-636.gif

To avoid personal injury and/or vehicle damage, refer to the service precautions at the beginning of this section.

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My processor is rated at 3000 but is only running

What you are trying to do is called overclocking, and there are some excellent guides for that on the internet, like here:
I suggest you read this before proceeding the overclocking.
You can open the BIOS (press a key like F1, F2, F8 or del during startup). Somewhere there will be a menu with options for voltages and frequencies (units in V and MHz)
As you have read, processor speed depends on the multiplier and front side bus speed: CPU Multiplier x FSB = CPU frequency.
Right now, your frequency is 2200 MHz (presumably 11 x 200)
To get it to 3000 MHz (3GHz), you either have to raise the option called FSB in the BIOS to 270 (270 x 11 = 2970), or increase the multiplier to 15 (200 x 15 = 3000). Before you do so, write both the values down, so that you can reset to them, in case things go wrong.
I sugest first trying to raise the multiplier from 11 to 15. It may however, be locked at 11. If you can get it to 15, you're done, your CPU is now running at 3 GHz.
If not, you'll have to go through some more trouble.

First, you'll need to find your memory (or RAM, or DDR) multiplier and frequency, in the same menu as the FSB and CPU multiplier. Write them down as well.
As you have also read, increasing the FSB will make your CPU and memory go faster. This may however, be too much for the RAM to handle.
With the FSB frequency and multiplier, you can calculate the frequency of your RAM just as with the processor.
You will now have to change FSB from 200 to 270, so you'll also have to calculate a new RAM multiplier, if you want the RAM to run at the same speed.
For example, your RAM frequency can be 200 (FSB) x 2 (multiplier) = 400. If you then increase FSB to 270, your RAM will run at 300 x 2 = 600. You will have to lower the multiplier to get as close to 400 as you can get, and preferably lower, if 400 cannot be achieved.
Having done this, you can slowly start to increase FSB, I would suggest by 10 at a time. As soon as the PC has trouble starting, in the BIOS, increase the CPU voltage by one step, until it runs stable again. However, as your CPU is rated at 3GHz, you shouldn't have any trouble with this,and should not have to increase voltages.

If you encounter any probems, let me know!

Dec 15, 2009 | ASUS A7N8X-E Deluxe nForce2 Motherboard

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How do you enter frequencies for finding standard deviation? For example, Frequency=50, total of X or raw scores = 366.5. Summation of X squared =2836.39. What is standard deviation? How do you enter the...

I am afraid I do not understand. The frequency of a PARTICULAR score is the number of times that particular value occurs in the data. It is not the number of data.
Ex: the data are:
4, 6, 5, 4, 4, 8, 9, 3, 3, 6, 7
Frequency of (3) =2
Frequency of (4)= 3
Frequency of (5) =1
Frequency of (6)= 2
Frequency of (7)=1
Frequency of (8)=1
Frequency of (9)=1

Number of data =11 (n=11)

You compute the mean M
M= (2x3 + 3x4 +1x5 +2x6+1x7+1x8+1x9) /11 =5.363636..
As you can see, if a term is not repeated it is multiplied by 1 (its frequency is one). Value 3 occurs twice (hence 2x3); value 4 occurs 3 times (3x4), etc.

To calculate by hand the sum of squares
3: (3-5.3636)^2 + (3-5.3636)^2 .................... = 2x(3-5.3636)^2
4: (4-5.3636)^2 + (4-5.3636)^2 +(4-5.3636)^2 = 3x(4-5.3636)^2
5: (5-5.3636)^2 ...................................... .= 1x(5-5.3636)^2
6: (6-5.3636)^2 +(6-5.3636)^2......................= 2x(6-5.3636)^2
7: (7-5.3636)^2.......................................... .=1x(7-5.3636)^2
8: (8-5.3636)^2......................................... ..=1x(8-5.3636)^2
: (9-5.3636)^2......................................... ..=1x(9-5.3636)^2
If I have not made a mistake the sum of squares is 40.5454

Standard Deviation
The standard formula above gives s= square root (40.5454/10) =2.01
Population Standard Deviation
The population Standard deviation above is S= square root (40.5454/11) =1.9198

So if you perform the calculation with the calculator the only times you need to enter the frequency is for repeated terms. When you have to enter 6 above, its frequency is 2 you proceed as follows
6 [2nd][FRQ] 2 [Sigma+]

Once you entered the raw scores, the calculator does the rest.
Hope it helps.

Nov 06, 2009 | Texas Instruments TI-30XA Calculator

1 Answer

Microwave comes on but doesn't heat ge.jvm1540

In the case of microwave ovens, the commonly used radio wave frequency is roughly 2,500 megahertz (2.5 gigahertz). Radio waves in this frequency range have an interesting property: they are absorbed by water, fats and sugars. When they are absorbed they are converted directly into atomic motion -- heat

So, NO Micro waves NO heat......... Need to check for Microwave emitter device installed inside.

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Microwave frequency

The frequency has to do directly with the the wave a microwave oven omitts. Frequency is a measure of the number of occurrences of a repeating event per unit time. Usually microwaves run at a frequency of 2.54 Ghz, a wave length of 12.34 CM.

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Sampling of the signal in "Analog communication".

The signal and signal frequency remain unchanged. In this context, these terms refer to the incoming, and not resultant, aspects of the system.

However, because the Nyquist frequency (1.75kHz, or half the sampling rate) is not greater than the signal bandwidth (4kHz), aliasing will be introduced into any reconstructed signal that is based on these samples. Not enough data about the signal has been captured to be able to recreate it in its original form.

If the signal is very simple (a sine wave, for instance), the "apparent frequency" of the result can be calculated without too much trouble. A more complex signal (i.e. a voice signal with a bandwidth of 4kHz) presents more analysis problems.

I suggest you read your textbook for further information.

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1 Answer


The 800 MHz seems to be your system bus speed and not the CPU speed. They a related but no quite the same. Overclocking is usually defined as forcing something to operate at a higher speed than it was designed to. If you changed the 800 MHz to 1.6 GHz in your BIOS then yes it could be considered overclocking.

One thing I would like to mention is that when changing clock speeds in your BIOS, do it in small steps, if done in large steps it can cause system instability.

Oct 28, 2007 | Intel (RK80532PG0881M) Pentium 4, 3 GHz...

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