h1

MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig …………………………………………………. with Kerry Cue

November 7, 2014


Mathspig Volcano

Hello My Cherubs,

This week we are survivors. Sort of.

Lava flowing from the Kilauea volcano is threatening tiny town of Pahoa in Hawaii.

Can you out run a lava Flow? You have to do the maths.

Volcano Survivor 1: Kilauea Volcano, Hawaii, 2014

Volcano Survivor 2: Mauna Loa Volcano, Hawaii, 1950

Volcano Survivor 3: Mount Unzen, Japan, 1991.

……………………………………………………………………………..

On your bike

…………………………………………………………………….

Cheerio

…………………………………………………………….

Mathspig

 

h1

Volcano Survivor 1: Kilauea Volcano, Hawaii, 2014.

November 7, 2014

Can you out run a lava flow?

dantes_peak_ver2In every volcano disaster movie from Volcano (1997) with Tommy Lee Jones to Dante’s Peak (1997) with Pierce Brosnan someone somewhere tries to out run a lava flow.

Is this possible? (See movie cliché busted by maths here.)

Now a lava flow from Hawaii’s Kilauea volcano is threatening tiny town of Pahoa, Hawaii. (below).

1 Kilauea Volcano   USGS

You will find excellent information about the Kilauea and other volcanoes at the

US Geological Survey here.

How to stop lava?

As the temperature of lava exceeds 10000 C there are very few ways to stop lava. According to the Taylor Kate Brown SMH (10 SEPT 2014) options include:

Bombing

Blasting (it with cold water)

Barricading it

Or adding concrete.

What if you are on your own.

Can you out run lava?

Lets do the maths.

Lava from Kilauea travels 17 yards per hour so the lava velocity is:

VL =   17 yds/hour = 15.5 metres /hour

(See Vox.com)

Mathspig simultaneous eqn 1

h1

Volcano Survivor 2: Mauna Loa Volcano, Hawaii, 1950

November 7, 2014
Once lava flows are established new RIVERLETS can run on top of the original lava flow at great speed.
Puu-Oo-USGS lava riverlets

The fastest Lava flows recorded were in Hawaii in 1950 when Mauna Loa erupted. The lava traveled at 6 miles (10 kilometers) per hour through thick forest. But once the lava flows became established and good channels developed, the lava in the channels was flowing at up to 60 miles/hour (97 kph)

Can you out run a lava flow?

You are 2 km from the volcano rim and start running.

VL =   97 kph = 1.6 km per minute (k/min)

     =   60 mph

VH = 18 kph = 0.3 km/min

   = 11.2 mph (miles per hr )

GRAPH:

How long will it take for the lava to catch you?

Mauna Loa Volcano Lava Flow 1950 2

 

SIMULTANEOUS EQNS:

How long will it take for the lava to catch you?

Mathspig simultaneous Eqn 2

h1

Volcano Survivor 3: Mount Unzen, Japan, 1991.

November 7, 2014

One of the greatest dangers in a volcano eruption is not the lava flow, being hit by a lump of flying lava or rock, but by being choked by the fast moving scorching hot pyroclastic cloud.

Mt Unzen  volcano-world

In 1991 pyroclastic cloud blew out of the side of Mount Unzen in Japan. NASA has an excellent diagrams for such an event here.

According to the NASA website:

Highly mobile, these flows reach velocities of up to 400 kilometers (250 miles) per hour and can spread as far as 100 kilometers (60 miles) from the eruption point.

Can you out run a pyroclastic cloud?

Mathspig simultaneous eqn 3

Here is what happened in 1991 when the pyroclastic cloud blew out of the side of Mount Unzen in Japan.

h1

MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig …………………………………………………. with Kerry Cue

September 30, 2014

Mathspig hogmobile 2

Hello Babies,

Randall MunroeRandall Munroe is a pro web cartoonist, maths nut and maths guru who answers crazy hypothetical questions using maths. His website is xkcd.

His TED lecture is here.

……………………………………………………………………..

Munroe_WHAT_IF_hi-591x768_mediumAnd his book What if? Can be found here.

Here are some of the questions Randall attacks:

When, if ever, will Facebook contain more profiles of dead people than of living ones?

Ans: It could be as early as 2065.

Could you get drunk from drinking a drunk person’s blood?

Ans: Not to be recommended.

At what speed would you have to drive for rain to shatter your windshield?

Ans: Mach 1 or really, really, fast.

……………………………………………………………………………………………..

Mathspig loves this crazy maths. Here are some of the hypothetical questions from mathspig:

Can you kill your teacher with chocolate! 

Can you outrun a zombie?

In the REAPING in The Hunger Games Maths what is the chance that a brother and sister are both selected as tributes?

In The TWILIGHT series Edward is an ethical vampire (He only consumes animal blood), but how many Shih tzus would he need a day to stay alive?

Mass Murderer or Maths Teacher?

Don’t forget the Baa Graph Ha! Ha!

baa-graph-1

……………………………………………………………………..

And now Mathspig has been cruising in her Hogmobile working out how far a car can travel on human fat. You will find interesting calculations here, here and here.

Ooooooh! I’ve got the munchies. I better go and make some more DIY bio-fuel.

Cheerio

Mathspig 

h1

1. Who uses more calories to travel 10 km: Mini or Man?

September 30, 2014

man vs mini 1a

Man vs mini 2a

Man vs mini 3a

ENERGY:

In Biodiesel

Consumed walking

In FAT including Human Fat

h1

2. How far do you have to walk to walk off 1 kg of fat?

September 30, 2014

Man vs mini 4a

ENERGY:

In Biodiesel

Consumed walking

In FAT including Human Fat

Follow

Get every new post delivered to your Inbox.

Join 76 other followers