Number One Observatory Circle

Standard

Netflix’s political thriller, House of Cards, starring Kevin Spacey premiered its 5 season two days ago. With out spoiling much–and if you haven’t seen it give it a watch but keep in mind season 3 is a transition–there comes a point where they begin talking about the Vice Presidency.

And it got me thinking.

Where does the Vice President live?

Continue reading

Advertisements

Spoon or No Spoon

Standard

While I was drinking my coffee this morning the thought occurred to me: how much faster does my coffee cool with the spoon in it?

So I did a rough estimation with the following assumptions:

  1. All cooling was done through natural convection following Newton’s Law of Cooling, with a convective heat transfer value of h=40 W/(m^2*K) and a bulk air temperature of 294 K (~70 F)
  2. The thermal conductivity of the coffee mug and the spoon are that of ceramic (k=1.5 W/(m*K)) and stainless (k=16 W/(m*K)) respectively
  3. The spoon has uniform temperature along it length equal to that of the bulk coffee
  4. The coffee cup is a cylinder with height of 4 inches and a diameter of 3.5 inches
  5. The spoon has a total length of 8 inches with heat transfer only occurring off the section of the handle emerging from the coffee
  6. Coffee has the same heat capacity and density as water
  7. Coffee is produced from the pot and poured into the cup at 355 K (~180 F)
  8. No heat is lost through evaporation of the coffee

And here are the results:

coffee.png

Blue represents the standard coffee.

Yellow is the coffee with spoon.

Red horizontal is safe drinking temperature (333 K).

Purple Horizontal is air temperature.

 

What can be gathered is the coffee with spoon hits the safe drinking temperature almost a full 150 seconds (2.5 minutes) sooner than the standard coffee.

This is not a life changing amount of time saved but it’s 2.5 more minutes of WordPress everyday.

Continue reading

Chocolate Milk

Standard

giphy

You wake up. It’s a bright and early 8:27 on Saturday morning.  A whole weekend of games, adventure and fun await you and your best friend. You jump out of bed in your ‘Action-Man’ PJ’s and run down stairs.

Continue reading

This is What You Need to Know about the Selfless Good Deed

Standard

Can-one-be-saved-if-he-only-accumulates-good-deeds-without-doing-evil-but-does-not-believe-in-God-2.jpg

In my younger days I recall sitting in front of the TV watching Friends with my mom and sister. I was much to young to understand the adult themes and jokes but the loud voices and funny characters kept my attention. We’d eat dinner while the cast went about their daily wacky lives in their fictional comedy driven version of New York.

There is one particular episode (504) that went beyond my memory and actually left a lasting impact.

Continue reading