# Thread: investigation question (powers and exponents)

1. ## 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

2. ## Re: investigation question (powers and exponents)

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 $\displaystyle \lambda$ use the formula given in the question. If you get stuck post what you've tried

3. ## 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 ?

4. ## Re: investigation question (powers and exponents)

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

b. how do I work out Hz ?

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

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

from the given formula for $\displaystyle \lambda$
...

5. ## Re: investigation question (powers and exponents)

ok thankyou for that i'll give it a try