Apr 30, 2010

Question Two: Drop

If you throw a ball level with the ground and drop a ball from the same hight which will hit the ground first?

Well of course the dropped ball. It travels the least distance. Right? Not really.
lets look at what is going on. Get in your car have some one else drive. Now sit still and drop the ball. Next  head down a straight road at a good speed. Repeat the drop it. What happened? It took about the same time didn't it? The first test the relative speed of the car was zero, then the speed was say fifty mph. You can do this in your head if you want. They both "fell" at the same speed whether or not the car was moving.

So what is going on here? People equate time with distance. This is only natural as it takes time to move a distance. Objects fall in time at the same rate as all other objects regardless of weight or size. So when an object falls it is pulled down at the same rate wether or not it is moving laterally with the ground or not. So when you toss an object level with the ground it will fall at the same rate as an object dropped. This principle is what allows us to have satellites in orbit.

A beautiful experiment to prove this point was done on Mythbuster's, where they shoot a bullet and drop a bullet.


Apr 26, 2010

Question One

Does Heat Rise or Fall?

If you put your hand above a candle then beside it that should answer it. So heat rises, right?
No, Hot air rises for he same reason ice and ships float, as well as lids pop off in microwaves.

Displacement. This is where an material like air is heated the molecules gain energy and vibrate more. The result is they begin to take up more room. Essentially making them less dense. Being less dense they rise above the denser matter and "float" up. As water freezes, becomes a crystal, the molecular alignment causes the "ice" to become less dense, takes up less room. Hence floats.

Fires in zero or very low gravity, extinguish themselves since the hotter air does not rise and the oxygen is not replaced due to lack of convection.

Apr 25, 2010

Hubble turns twenty and doesn't even act like a teenager

Wow has it been Twenty years already. The Hubble has done for science's image more than any other scientific instrament out there. When talk of letting the Hubble go by the wayside and die in orbit my heart sank. and then the fantastic rescue mission, the most complicated repair mission in space yet.

For me the greatest discovery of Hubble has to be when we pointed the lens to the darkest place in the Sky. The images we received of millions of galaxies sent shivers down my spine.

Here's a link to some great pictures.

Apr 22, 2010

Re-Writing several of my former post.

Sorry about the Hiatus, we had a death in the family. For the next few post I will be on the back burner and rewriting a few of my old post, trying to make them "more better". lol. Anyone who is a regular, thanks for the patients being patient.


Apr 9, 2010

New Podcast Coming...Next Week.

This Podcast Marshal and I Interviewed Peter Sinclair from YouTube. His channel is GreenMan6610.

We covered some basic misconceptions and only scratched the surface of global warming. 

Look for the podcast Agnostic Salvation Hour, WTEL3 ( where the evidence leads ) next week on PodOmatic and iTunes.