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Questions and Answers

Your Questions About X100

May 30, 2013

Donna asks…

What is the wavelength associated with a FM radio station that transmits at 96.5 MHz?

I know that you have to use the equation frequency=c/wavelength, but I am getting the wrong answer. Do you have to convert Mhz to Hz? If so how?

Administrator answers:

If there is one thing you need to learn, it’s metric prefixes. You
will use them in a variety of ways the rest of your life, no matter
what you do.

SI (metric) prefixes:

da (deca) = x10 (rarely used)
h (hecto) = x100 (rarely used)
k (kilo) = x1000 = e3
M (Mega) = x1000000 = e6
G (Giga) = x1000000000 = e9
T (Tera) = x1000000000000 = e12
P (Peta) = x1000000000000000 = e15
E (Exa) = x1000000000000000000 = e18
Z (Zetta) = x1000000000000000000000 = e21

d (deci) = /10 = e-1 (rarely used)
c (cent) = /100 = e-2 (rarely used except for cm)
m (milli) = /1000 = e-3
µ (micro) = /1000000 = e-6
n (nano) = /1000000000 = e-9
p (pico) = /1000000000000 = e-12
f (femto) = /1000000000000000 = e-15
a (atto) = /1000000000000000000 = e-18

Laura asks…

What are the formulas for depreciation and inflation?

What are the basic formulas to find depreciation and inflation? The formula for appreciation and deflation would be great too. Thanks

Administrator answers:

Depreciation ( per year) = Purchase cost / life of article , i.e. 100/life % p.a.
Inflation = (CPI this year / CPI last year.-1) x100 in % terms
Deflation = same as above only sign changes.
Appreciation = (value or price this year / value or price last year.-1) x100 in % p.a. Terms

George asks…

How would i calculate the percentage error?

For a chemistry lab, we hypothesized the heat released in the 3 seperate experiments, and i got those answers.

Then we did the actual experiment and i got different answers.

So for the percentage error, the instructions say to compare the difference between the 3rd enthalpy (its hess’ law so its the combination of the 1st and 2nd equations) from the 1st and 2nd heat changes. and then divide by the 3rd.

But do i use any of the hypothesis’ answers?

Administrator answers:

% error = observed(experimental) value – accepted value over the accepted value x100.

So
%error= (o-a)/a x100

Donald asks…

What is another way to specify the frequency of a radio signal…..?

What is another way to specify the frequency of a radio signal that is oscillating at 1,500,000 Hertz? The answer is 1500 kHz. i don’t understand how you would get this answer. someone help

Administrator answers:

1500000 Hz = 1500 kHz = 1.5 MHz
Unless you are 8 years old, you should know about metric prefixes.

If there is one thing you need to learn, it’s metric
prefixes. You will use them in a variety of ways the rest
of your life, no matter what you do.

SI (metric) prefixes:

da (deca) = x10 (rarely used)
h (hecto) = x100 (rarely used)
k (kilo) = x1000 = e3
M (Mega) = x1000000 = e6
G (Giga) = x1000000000 = e9
T (Tera) = x1000000000000 = e12
P (Peta) = x1000000000000000 = e15
E (Exa) = x1000000000000000000 = e18
Z (Zetta) = x1000000000000000000000 = e21

d (deci) = /10 = e-1 (rarely used)
c (cent) = /100 = e-2 (rarely used except for cm)
m (milli) = /1000 = e-3
µ (micro) = /1000000 = e-6
n (nano) = /1000000000 = e-9
p (pico) = /1000000000000 = e-12
f (femto) = /1000000000000000 = e-15
a (atto) = /1000000000000000000 = e-18

.

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