Thursday, March 27th, 2008 Posted in Dinosaurs | No Comments »
No. They narrowly missed each other on the evolutionary timescale. In this case, narrowly means about 65,000,000 years. Contrary to some creationist theories you may have uncovered if you searched ... Read more..Wednesday, March 26th, 2008 Posted in Astronomy, Physics | No Comments »
Hubble's Constant is the rate ratio of the speed at which a galaxy is moving away from Earth divided by its distance from Earth. Note, this is obviously not our ... Read more..Wednesday, March 26th, 2008 Posted in Astronomy, General Science, Physics | 2 Comments »
Most scientists estimate the time between the Big Bang and current day somewhere between 13 and 20 billion years ago. Estimates are derived from Hubble's Constant, a rate of expansion ... Read more..Wednesday, March 26th, 2008 Posted in Chemistry, Geology | 2 Comments »
Oxygen is the most abundant. It comprises 49.5% of the total mass of the Earth's crust, water, and atmosphere. The second most abundant is Silicon (Si) at 27.7% of Earth's ... Read more..Wednesday, March 26th, 2008 Posted in Chemistry, Physics | No Comments »
The half-life of a substance is the time it takes for the number of radioactive nuclei to decrease to one half of the original number. The halflife of a given ... Read more..Wednesday, March 26th, 2008 Posted in Physics | No Comments »
The phenomenon that explains the apparent change in wavelength of radiation (either sound waves or light waves) due to relative motion between the source and the receiver. This was first ... Read more..Wednesday, March 26th, 2008 Posted in Physics | No Comments »
The dimples reduce drag allowing the ball to travel faster for a longer time- and thus farther. The dimples reduce drag because the fast-moving air tends to remain closer to ... Read more..