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The Question & Answer (Q&A) Knowledge Managenet

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Table of Contents

- What is frequency Hz?
- What is the frequency and period of a wave?
- Is period and frequency the same?
- How do you find period and frequency?
- What is the frequency of circular motion?
- What is the frequency of this wave 1234?
- How do you calculate the frequency of water waves?
- Can the wavelength of a wave affect its frequency in what way?
- What is the frequency of a graph?
- How do you find the frequency of a sine wave?
- What is a frequency bar graph?
- What does a relative frequency bar graph look like?
- What is the difference between relative frequency and frequency?
- How do we find relative frequency?
- What is one word frequency?
- Why is frequency V?
- What are the four types of frequencies?
- What is frequency unit?

Frequency is the rate at which current changes direction per second. It is measured in hertz (Hz), an international unit of measure where 1 hertz is equal to 1 cycle per second. Hertz (Hz) = One hertz is equal to one cycle per second. Cycle = One complete wave of alternating current or voltage.

Since wave frequency is the number of waves per second, and the period is essentially the number of seconds per wave, the relationship between frequency and period is. f = 1 T f = 1 T.

Period refers to the time it takes something to happen. Frequency is a rate quantity. Period is a time quantity. Frequency is the cycles/second.

How to get period from frequency?

- The formula for period is T = 1 / f , where “T” is period – the time it takes for one cycle to complete, and “f” is frequency.
- To get period from frequency, first convert frequency from Hertz to 1/s.
- Now divide 1 by the frequency. The result will be time (period) expressed in seconds.

Period, , is defined as the amount of time it takes to go around once – the time to cover an angle of radians. Frequency, , is defined as the rate of rotation, or the number of rotations in some unit of time. Angular frequency, , is the rotation rate measured in radians.

Since a longitudinal wave is composed of 1 compression and 1 rarefaction therefore the frequency of the given wave is 2 Hz.

Divide the wavelength into the velocity to calculate the frequency, expressed as described above as the number of cycles per second, or Hertz – written “Hz.” For example, a water wave with a wavelength of 1 foot traveling at a speed of 4 inches per second has a frequency of 1/3 feet/second divided by 1 foot = . 33 Hz.

Even though the wave speed is calculated by multiplying wavelength by frequency, an alteration in wavelength does not affect wave speed. Rather, an alteration in wavelength affects the frequency in an inverse manner. A doubling of the wavelength results in a halving of the frequency; yet the wave speed is not changed.

frequency: The frequency of a trigonometric function is the number of cycles it completes in a given interval. This interval is generally 2π radians (or 360º) for the sine and cosine curves. A sinusoidal curve is the graph of the sine function in trigonometry.

In a sinusoidal model of the form y = a⋅sin(b(x−c))+d , the period is found by taking 2⋅π|b| . Frequency is the reciprocal of period. Example: y = 2⋅sin(3x) would have a period of 2π3 , which is one-third the length of the “normal” period of 2π .

A bar graph is used to compare the frequency of a category or characteristic with that of another category or characteristic. The bar height (if vertical) or length (if horizontal) shows the frequency for each category or characteristic.

A relative frequency bar graph looks just like a frequency bar graph except that the units on the vertical axis are expressed as percentages. In the raisin example, the height of each bar is the relative frequency of the corresponding raisin count, expressed as a percentage: See Note 9, below.

An easy way to define the difference between frequency and relative frequency is that frequency relies on the actual values of each class in a statistical data set while relative frequency compares these individual values to the overall totals of all classes concerned in a data set.

A relative frequency is the ratio (fraction or proportion) of the number of times a value of the data occurs in the set of all outcomes to the total number of outcomes. To find the relative frequencies, divide each frequency by the total number of students in the sample–in this case, 20.

Frequency describes the number of waves that pass a fixed place in a given amount of time. The hertz measurement, abbreviated Hz, is the number of waves that pass by per second. For example, an “A” note on a violin string vibrates at about 440 Hz (440 vibrations per second).

It is NOT the letter v, it is the Greek letter nu. It stands for the frequency of the light wave. Frequency is defined as the number of wave cycles passing a fixed reference point in one second. This is one cycle of the wave and if all that took place in one second, then the frequencey of the wave is 1 Hz.

Wavelength:

ELF | EXTREMELY LOW FREQUENCY Frequency: 3 KHz to 30 KHz Wavelength: 100 km to 10 km |
---|---|

HF | HIGH FREQUENCY Frequency: 3 MHz to 30 MHz Wavelength: 100 m to 10 m |

VHF | VERY HIGH FREQUENCY Frequency: 30 MHz to 300 MHz Wavelength: 10 m to 1 m |

UHF | ULTRA HIGH FREQUENCY Frequency: 300 MHz to 3 GHz Wavelength: 1 m to 100 mm |

Hertz