Recent content by Drakkith

Non-GHG's CAN radiate energy away. They just can't do it the same way that GHG's do. Asymmetric molecules like GHG's can directly absorb and emit IR radiation like that emitted from the Earth's surface. Symmetric molecules like N2 and O2 cannot do this, but they can radiate some of their kinetic...

I'm not sure what this last part means. Greenhouse gases absorb IR radiation that would otherwise be radiated away from the planet and into space. This heats the GHG's which then pass the heat to the rest of the surrounding air or radiate it away. Of the energy radiated away, about half of it is...

Hey all. Looks like my 15 year anniversary of joining PF happened yesterday (while my internet was down). Just wanted to say thanks to everyone, staff and non-staff, for helping make PF such a wonderful community over the years. Here's to everyone at PF, current, past, or future. Cheers!

Got some 6 ft ramps from a local store. Works perfect.

Thanks all!

I haven't really started to look yet, as I didn't know how long they needed to be.

Hey all. I'm looking to buy a zero-turn mower and I need to build/purchase a ramp to get it into my shed for storage. Exact model is this one. I need to figure out how long of a ramp I need to make sure the mower doesn't bottom out when driving up and down the ramp. Mower stats: Wheelbase...

If you spill a bunch of batteries into a stream, are the volts flowing now?

I believe the 'speed' is referring to the FPS of the camera.

Don't worry. It's filled with foam pellets so it doesn't hurt when it hits you. :wink:

Nice!

I wonder if a rotating neutron star would emit much RF radiation if its magnetic poles coincide with its physical poles. @Ken G any idea?

I'm not sure what to tell you that hasn't already been said. You cannot use the motion of the bike to charge the same battery you are using to power the bike, except during regenerative braking.

I don't know what you're trying to say with this.

Let's say the battery outputs 100 watts to the circuit that includes the generator. The generator will receive 95ish watts thanks to losses in the battery and the rest of the circuit. Then the generator will output 90ish watts, again due to various losses (resistance, radiative losses, etc)...