Can't do them at all!! Help please!

Posted Sun 13th January, 2013 @ 17:50 by

Crystal Blue ♥
Answered Sun 13th January, 2013 @ 18:37 by

Tilly - Team GR
I understand what powersa are and stuff its just the equations, for example:

Electromagnetic waves travel at a speed of 3.0 x 10 (to the power of 8) m/s. A radio station transmits waves with a wavelength of 2.5 x 10 (squared) m.

Calculate the frequency of the radio waves.

*The equation is:*

**v = f × λ**

**Speed - Frequency x Wavelength**

But thank you for answering anyway Tilly :)

**UPDATE**:

The answer is 1.2 x 10 (to the power of 6) / 1200000

But I just don't know how I can work it out, and Ive found that this question always pops up in an exam :(

Answered Mon 14th January, 2013 @ 17:12 by

Crystal Blue ♥Edited by

Crystal Blue ♥ on Mon 14th January, 2013 @ 17:17

Answered Tue 15th January, 2013 @ 18:08 by

Crystal Blue ♥
Hii for your question you put V = F x ** λ in a formula triangle **

**and then it should be F= velocity/wavelength **

**so it's 3.0x 10 (to the power of 8) divided by 2.5x10 (squared) which equals **1200000

Answered Wed 16th January, 2013 @ 17:44 by

maya
Yes, you just re-arrange the equation.

Answered Wed 16th January, 2013 @ 17:53 by

Amnah Anjum
Thank you I understand now :)

Answered Sun 20th January, 2013 @ 11:39 by

Crystal Blue ♥