Fact Of The Day

[alandhopewell]

     Scorpions, for some reason, flouresce under black light....

[Leah]

In the painting The Ambassadors, there is a skull between the two ambassadors.

[Vik]

The tallest tree ever was an Australian Eucalyptus, in 1872 it was measured 435 feet tall.

[Hammock Rider]

     Scorpions, for some reason, flouresce under black light....

I wonder if that means that they can see in the UV spectrum?

[alandhopewell]

     Scorpions, for some reason, flouresce under black light....

I wonder if that means that they can see in the UV spectrum?

     Evidently not....

http://www.thebestcontrol.com/bugstop/control_scorpions.htm

[ulthar]

Newton's second law is not valid for variable-mass systems, such as rockets.

Sorry, but this is not true at all.  It only seems true for the simplified statement of the Law given in Introductory texts:

F = ma

However, the more general and more correct expression for this law is

F = dp/dt,

which is that the force is equal to the first time derivative of momentum.

In the special case of constant mass and since p = m v,

F = m dv/dt,

or, mass times the first time derivative of velocity...or acceleration.  Thus, in the special case of constant mass,  F = m a.

So, F = ma is only a special case of the Law that is used for beginners, but it's not the actual general Law.

Back to regular programming....

[AndyC]

On the subject of things that glow under ultraviolet light, tonic water has a pleasant bluish glow, thanks to the quinine it contains. I learned this many years ago when vodka and tonic was my drink of choice. Ordered one in a club with a lot of black lights, and got a surprise. Actually two surprises, if you include a naked woman (yes, it was that kind of club), coming over and asking about my drink.

[alandhopewell]

     In Virginia, there is a state law making it illegal to place a house on the market without disclosing that it is haunted.

http://nvar.com/index.php/law-ethics/article/do_you_have_to_disclose_that_a_house_is_haunted

[Leah]

Vesna Vulovic survived a 33,000 ft drop when the plane she was on blew up from a terrorist attack.

[alandhopewell]

Vesna Vulovic survived a 33,000 ft drop when the plane she was on blew up from a terrorist attack.

      I'll bet her underwear didn't....

[Newt]

In 1814 Louis Comte was the first conjuror to publicly pull a rabbit from a top hat.

[Hammock Rider]

Newton's second law is not valid for variable-mass systems, such as rockets.

Sorry, but this is not true at all.  It only seems true for the simplified statement of the Law given in Introductory texts:

F = ma

However, the more general and more correct expression for this law is

F = dp/dt,

which is that the force is equal to the first time derivative of momentum.

In the special case of constant mass and since p = m v,

F = m dv/dt,

or, mass times the first time derivative of velocity...or acceleration.  Thus, in the special case of constant mass,  F = m a.

So, F = ma is only a special case of the Law that is used for beginners, but it's not the actual general Law.

Back to regular programming....

  Sorry Ulthar, everything I know about Physics I learned from Wikipedia ( And Real Genius)

[Hammock Rider]

Molybdenum is a silvery metal that has the sixth-highest melting point of any element.

[ghouck]

     One in every four Americans has appeared on television.

I have a few times, and NO, none of them were episodes of COPS or America's Most Wanted.

One time it WAS Lockup: Raw though.

[ghouck]

There is a fine line between having a good time and being a wanton slut.

True, but that line is easily ignored.