# investigation question (powers and exponents)

• Nov 20th 2011, 06:05 AM
benh1995
investigation question (powers and exponents)
hello there i am new to the board, i have been trying to solve this all morning and haven't come to a recognisable conclusion, wonder if anyone could try giving me some help on how to carry out a question like this, i am doing gcse maths
• Nov 20th 2011, 06:33 AM
e^(i*pi)
Re: investigation question (powers and exponents)
Quote:

Originally Posted by benh1995
hello there i am new to the board, i have been trying to solve this all morning and haven't come to a recognisable conclusion, wonder if anyone could try giving me some help on how to carry out a question like this, i am doing gcse maths

From our SI Prefixes we know that 1kHz = 1000 Hz

To find $\lambda$ use the formula given in the question. If you get stuck post what you've tried
• Nov 20th 2011, 06:44 AM
benh1995
Re: investigation question (powers and exponents)
I have no clue where to start at all, I need some sort of explanation to this, my understanding of this is poor..

a. what is ms in the speed formula ?
b. how do I work out Hz ?
c. how do I work out the wavelength in metres ?
• Nov 20th 2011, 08:01 AM
skeeter
Re: investigation question (powers and exponents)
Quote:

Originally Posted by benh1995
I have no clue where to start at all, I need some sort of explanation to this, my understanding of this is poor..

a. what is ms in the speed formula ?

units of speed ... $ms^{-1}$ which is $\frac{m}{s}$ (meters per second)

b. how do I work out Hz ?

$f = \frac{v}{\lambda}$ where $v$ is in m/s and $\lambda$ is in m

c. how do I work out the wavelength in metres ?

from the given formula for $\lambda$

...
• Nov 20th 2011, 10:52 AM
benh1995
Re: investigation question (powers and exponents)
ok thankyou for that i'll give it a try