What is this unit?

1. Dec 29, 2011

iphilosopher

Change the forum if this is in the wrong place but I was doing some math (multiplying hertz and watts) and I came with 4.8912 × 10^12 m^2 kg / s^4, I don't know what unit that is, so can anybody tell me if there even is one?

2. Dec 29, 2011

Dickfore

there is no known physical quantity with those dimensions.

3. Dec 29, 2011

Staff: Mentor

$$Watt = Joule/s = kg*m^2*s^{-3}$$

$$Hertz = s^{-1}$$

So your units are correct. Basically it's Joules per s^2, or Watts per second.

But as pointed out, it is unusual to multiply power and frequency. What was the calculation for?

4. Dec 30, 2011

iphilosopher

I meant to divide hertz and watts and I would get 2 122.91667 m^-2 * kg^-1 * s^2 so now I think my question truly is what is that unit

5. Dec 30, 2011

Staff: Mentor

As asked, what are you trying to accomplish? It almost seems like you are doing blind math, hoping to stumble on something interesting.

Last edited by a moderator: Dec 30, 2011
6. Jan 1, 2012

iphilosopher

I was trying to find how far one photon can go like with a radio transmitter, how far could one of those photons could go. And now I found I did not have enough information to do these calculations.

7. Jan 2, 2012

Antiphon

There's no limit to how far a photon can go. But I'm not sure you can come to a conclusion like that by doing dimensional analysis. Sometimes interesting things can pop out though.