Posts Tagged ‘amazing’

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The Terrifying Maths of Running from a Bear … Metric Units

July 17, 2017

METRIC UNITS below. USA UNITS here.

BEAR STATISTICS

Grizzly Bear

Weight:   250kg

Height:   250cm

Top Speed: 56kph  =   16 m/sec

More bear stats here. 

Brown Bear

Weight:  680kg

Height:   250cm

Top Speed: 35kph  = 10m/s

More bear stats here.

Comparing these speeds to the fastest man on earth, Usain Bolt:

Usain Bolt:

Top speed: 243kph =   12m/s

So Usain Bolt could out run a Brown Bear but NOT a Grizzly!

Bears are NOT as dangerous as:

In fact more Americans die choking on their own vomit each year than a re killed by bears.

More death stats here.

But bears are very fast so Park Rangers recommend the following survival tactics:

More bear survival info here.

REF: Dog helps save hikers after grizzly chases them for 20 minutes here.

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The Terrifying Math of Running from a Bear … USA Units

July 17, 2017

USA UNITS below. METRIC UNITS here.

BEAR STATISTICS

Grizzly Bear

Weight:  550 lb        

Height:  8’ 2”   

Top Speed: 35 mph  =   51 ft/s    

Brown Bear

Weight:  1,500 lb       

Height:  8’ 2”              

Top Speed: 22 mph  =  32 ft/s     

Comparing these speeds to the fastest man on earth, Usain Bolt:

Usain Bolt:

Top speed: 27 mph  =   40 ft/s     

Bears are not dangerous:

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In fact, more Americans die each year from choking on their own vomit than are killed by bears.

More death stats here

Nevertheless, bears are very fast. So you can see why Park Rangers offer the following advice:

More information at Mountain Nature.

The reason for waiting until the bear is 15 ft away is to make sure the spray doesn’t disperse in the air. If the Pepper Spray is too spread out it will not stop the bear.

Ref: Dog helps save hikers after grizzly chases them for 20 minutes.

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4. Middle School Madness: BIG MATHS

May 19, 2017

TAKE 1:

1 yard = 36 in = 91.4 cm = 0.91 m

Here is the AMAZING thing … according to designer Tom Wujec, who gives the TED lecture (below), the most successful tower builders are not business school graduates or CEOs, but kindergarten students. The stats are in the video. So here is the challenge. Can you build a structure higher than the towers built by kindergarten kids? 

Towers built by Kindergarten Kids AVERAGE HEIGHT = 71 CM or 28 INCH

HIGHEST TOWER from 70 challenges = 99 CM or 39 INCH

More information at Marshmallow Challenge.

The Tom Wujec TED talk is aimed at business ‘team building’. Nevertheless, it is an interesting challenge and fun too.

TAKE 2:

In fact, the Marshmallow Tower has been around for a very long time. This challenge for middle school kids involves as many marshmallows and sticks of spaghetti needed to build the biggest tower. This is also a great end of year/semester/week challenge.

Mathspig posted this picture of an awesome marshmallow tower here.

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Best Maths Class April Fools Day Pranks

March 23, 2017

1. Frostbite Theatre

This is a cool trick to show the class. k

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2. Maths Teacher Totally Pranked

This maths teacher is, like, sooooo pranked.

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3. Rounding off pi

You have to wait until No. 10. But there it is! It is official. We’re going to round pi off to 3.

Hey, it’s about time isn’t it.

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4. Matthew Weathers

The best maths class April Fools trick ever as the numbers show!

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Pi on TV

March 8, 2017

1.  The Simpsons

When Marge is accused of stealing from Apu’s Quickie Mart his memory is tested. He says his memory is very good. He can recite pi to 40,000 places!!! Also on Numberphile: A Mile of Pi.

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2.  The Late Show with David Letterman

Maths savant Daniel Tammet explains that he can recite Pi to 22,000 places. But wait until you hear how long it takes. Amaaaazing!!!!!

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3.  Star Trek

Spock sorts out a computer with the command to calculate Pi. Cool!!!!

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4.  Mathletics

Look for the second maths blooper in this clip. The folks at Mathletics get Pi wrong!!!!! Great spotting Mathologer.

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5.  MTV Kate Bush

Some may prefer to listen to Apu reciting Pi to 40,000 decimal places. Nevertheless, here is Kate Bush singing about Pi.

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Use the WIFI Force, Luke!

February 23, 2017

So you have cracked the WIFI password (above). It’s time for some Fun, Fun, Funnies.

Here are Mathspig’s favourite WIFI names:

Duracell Bunny Arrested

Charged With Battery

Get Your Own Damn Wi-Fi

FBI Surveillance Van 4

Go home tourists

And check the links at the end of this post for a little bit of weird.

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7-wifi-maths8-wifi-maths

Weird 1:

Google Image this number: 241543903

It leads to a meme of people posting ‘put your head in a refigerator’ selfies. Why? Dunno.

Weird 2:

Google: Definition (Defn will do) of ‘askew’.

The Google page is askew!!!! Really. What is the angle of the page below horizontal. You can work it out.

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The Simple Maths of a Car used as a Weapon … METRIC units

February 3, 2017
NIce Truck Attack 2016 The Independent, UK

Nice Truck Attack 2016 The Independent, UK

Berlin Christmas Maraket Attack 2016, ABC

Berlin Christmas Maraket Attack 2016, ABC

Melbourne Car Attack 2017

Melbourne Car Attack 2017.

Cars (and trucks) have been used as weapons by drivers purposefully driving into crowds including:

2014: Saint-Jean-sur-Richelieu, Quebec

2014 : Jerusalem, Israel.

2016: Nice, France

2016: Berlin, Germany

2017: Jerusalem, Israel

2017: Melbourne, Australia.

What does the maths tell us?

Melbourne is Mathspig’s home town. The car attack killed, tragically, 6 people and injured many more. The question many seem to ask is:

Why can’t people get out of the way?

Look at the video below of the Melbourne car. It doesn’t appear to be going that fast. But the maths tells a different story. You need quite a distance between you and a car travelling at approx 60 kph to have enough time to run clear. (See calculations below)

How fast do you react?

We will set your reaction time at 0.4 sec. This allows time for you to react and turn. If you want to test your reaction time go here. But remember you have to turn as well.

How fast would you run?

According to the Telegraph, UK, the average human can run at 15.9 mph (25.6 kph) and the National Council of Strength and Fitness 15 mph (24.1kph), which Mathspig has rounded off to 25 kph.

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How do you escape a car travelling at 60 kph towards you when you are less than 9 m away?

Jump upwards!

You might reduce the impact and even go over the roof.

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