Electronic frequency-oeriod conversion help?

[Theminecraftaddict555]

I am trying to convert a frequency number that has a khz unit to it and when I get the period by doing the reciphorical, I don't know what unit to use?

 

Also the answer has to be in decimal form, in this case my period answer is .04 after doing the reciprocal of the frequency 20 khz....What unit do i use to get it to decimal form? (like ms or something)

[Sauron]

seconds. 40 milliseconds.

[Theminecraftaddict555]

5 minutes ago, Sauron said:

seconds. 40 milliseconds.

how about for the frequency of 45 mhz? what period would equal from that?

[Verrierr]

8 minutes ago, Theminecraftaddict555 said:

how about for the frequency of 45 mhz? what period would equal from that?

is it mili or mega?

[Theminecraftaddict555]

Just now, Verrierr said:

is it mili or mega?

mega 

[Sauron]

9 minutes ago, Theminecraftaddict555 said:

how about for the frequency of 45 mhz? what period would equal from that?

1/45000000 seconds

[Theminecraftaddict555]

1 minute ago, Sauron said:

1/45000000 seconds

so it would 2.2222222, then how would i convert that to decimal form? 

[Verrierr]

Just now, Theminecraftaddict555 said:

mega 

So from this formula T=1/f if you substitute 45MHz for f you het T=1/45 s * 1/M and since M=10e6 the solution is T=0,0(2)*10e-6=0,0(2)us (u stands for micro)

[Theminecraftaddict555]

1 minute ago, Verrierr said:

So from this formula T=1/f if you substitute 45MHz for f you het T=1/45 s * 1/M and since M=10e6 the solution is T=0,0(2)*10e-6=0,0(2)us (u stands for micro)

Hmm that is not how i was taught in class though? 

[Sauron]

3 minutes ago, Theminecraftaddict555 said:

so it would 2.2222222, then how would i convert that to decimal form? 

I doubt 1/45000000 can be larger than 1

[Verrierr]

Just now, Theminecraftaddict555 said:

Hmm that is not how i was taught in class though? 

How were you taught then?

[Theminecraftaddict555]

Just now, Verrierr said:

How were you taught then?

Well your conversion technique is different from how we were told to do it in class and the way you explained it seemed confusing and different from the methods we were taught in class

 

We were told to take the reciphorical of whatever the frequency is and end up with the decimal and use decimal conversion (which i have no idea which to conversion to use) to get our full answer especially if the answer starts with a decimal 

[Theminecraftaddict555]

3 minutes ago, Sauron said:

I doubt 1/45000000 can be larger than 1

nvr mind, i think i fixed it..Is it .02222222? 

[Verrierr]

Just now, Theminecraftaddict555 said:

nvr mind, i think i fixed it..Is it .02222222? 

At least use units. That way we will know what you're talking about.

[Sauron]

3 minutes ago, Theminecraftaddict555 said:

nvr mind, i think i fixed it..Is it .02222222? 

you're dealing with a fraction where the second number is in the order of 10 millions. The answer will not be 2 hundredths.

[Theminecraftaddict555]

1 minute ago, Verrierr said:

At least use units. That way we will know what you're talking about.

that's the issue, i found the answer to be 0.2222222 but need to convert in decimal form using scientific notation or metrics to find the true answer with the actual units 

[Theminecraftaddict555]

1 minute ago, Sauron said:

you're dealing with a fraction where the second number is in the order of 10 millions. The answer will not be 2 hundredths.

Okay since this is getting confusing to me

 

the way i did it was simply use the reciphorical of that frequency number of 45 mhz (millihertz) and took the reciphorical of that by doing 1/45 to get .0222222222 but not sure about how to use metric or scientific notations to get the true answer 

[Sauron]

2 minutes ago, Theminecraftaddict555 said:

Okay since this is getting confusing to me

 

the way i did it was simply use the reciphorical of that frequency number of 45 mhz (millihertz) and took the reciphorical of that by doing 1/45 to get .0222222222 but not sure about how to use metric or scientific notations to get the true answer 

Oh, itr's MILLIhertz. I thought you mean mega.

 

The reciprocal must be done with the correct size. milli is just an abbreviation for thoudandth. 45 millihertz are equal to 0.045 hertz. Therefore, to get the correct period you need to do 1/0.045.

 

You really should know this, if you haven't understood it from your lessons then your teacher isn't very good. Make sure you understand what milli, kilo, mega, giga etc stand for before you worry about converting Hz to seconds.

[Theminecraftaddict555]

1 minute ago, Sauron said:

Oh, itr's MILLIhertz. I thought you mean mega.

 

The reciprocal must be done with the correct size. milli is just an abbreviation for thoudandth. 45 millihertz are equal to 0.045 hertz. Therefore, to get the correct period you need to do 1/0.045.

 

You really should know this, if you haven't understood it from your lessons then your teacher isn't very good. Make sure you understand what milli, kilo, mega, giga etc stand for before you worry about converting Hz to seconds.

It is in IT class, we just learned it today..Unfortunately, the IT does not focus on electrician-related stuff much and only touch it for one day and then move on 

[Verrierr]

5 minutes ago, Theminecraftaddict555 said:

It is in IT class, we just learned it today..Unfortunately, the IT does not focus on electrician-related stuff much and only touch it for one day and then move on 

If we're talking about period to frequency conversion and vice versa all you need to remember is this formula: T=1/f  (T stands for period, f stands for frequency)

Edit: Alternative form is f=1/T

[Sauron]

2 minutes ago, Theminecraftaddict555 said:

It is in IT class, we just learned it today..Unfortunately, the IT does not focus on electrician-related stuff much and only touch it for one day and then move on 

Make sure you're familiar with this:

Frequency represents how often something happens and is measured in Hz, which are another way of writing 1/s. 1 Hertz means once per second.

 

Either way this does not have much to do with basic IT, you'll probably see it again in math or physics. In fact, you could ask your math or physics teacher to explain this better to your class, it could turn out well.