The Terrifying Math of Running from a Bear … USA Units

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.

The Terrifying Maths of Running from a Bear … Metric Units

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.

Medals, Meglomaniacs and Sharp Shooters…….. The Math USA units

When Mathspig recently saw images of some Russian soldiers covered in medals it prompted the question

‘Could medals protect the wearer from a sharpshooter?’ 

Mathspig was interested in this question because megalomaniac military dictators who take over countries by force tend to award themselves lots of medals. But they are also likely to be the target of sharpshooters from a liberation movement.

The target zone (circle) had a diameter of 0.7 inches. This is smaller than the diameter of an American Quarter, an Australian 10c and a UK pound all of which have a diameter of approx 0.96 inches.

So the megolmaniac military dictator wins!!! He IS protected – on his chest – by his medals!!!!!! Unless the sharpshooter manages a ‘lucky’ shot.

Giant Easter Egg Math … USA units

Good News for Chocoholics

To get the right texture Easter Eggs are made from sugar or sucrose and not from corn syrup. But chocolate contains lots and lots of sugar.

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Guylian Sea Shells:

Weight Sea Shell: 4.23 oz

Weight Sugar: 1.69  oz

% sugar = 1.69/4.23 x 100 = 40%

………………………………………………………………..

………………………………………………………………

This is a Guylian Luxury Easter Egg. It can also be used as a designer handbag, I guess.

Guylian Easter Eggs:

Weight Easter Egg: 3.53  oz

Weight Sugar: 1.83 oz

% sugar = 1.83/3.53 x 100 = 52%

You’ll find nutrition data here.

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Easter Challenge:

You will find the largest Chocolate Easter Egg ever here.

This egg is 34 ft 1.05 in high and weighs 15,873lbs, but  it is ugly.

I like the GUYLIAN GIANT EGG (below) because it looks good and we know exactly how much sugar is in this egg.

This Giant Egg was made in 2005 in Belgium by chocolate maker Guylian.

Statistics:

Height:  27 ft

Weight:  4300 lb Chocolate

No. Chocolatiers: 26

No. Chocolate bars: 50,000

Total time: 525 hrs

Easter Challenge for Chocoholics

The amount of sugar in the giant egg weighs as much as a Fiat Punto.

April Fool Math TEST USA

Tell your year 8 or 9 students this test is designed to test their ability to concentrate and use logic while doing a challenging test under pressure. 

Tell students to circle the ‘correct’ answer. Then wait to see how long it takes them to think you have totally lost the plot! You can make copies of the test using the PDF links below. You can put the answers up later on the smart board or just read out the answers.

Mathspig April Fools Math Test 1 USA

Mathspig April Fools Math Test 2 USA

Mathspig April Fools Math Test ANSWER USA

April Fool Maths Test

Tell your year 8 or 9 students this test is designed to test their ability to concentrate and use logic while doing a challenging test under pressure.

Tell students to circle the ‘correct’ answer. Then wait to see how long it takes them to think you have totally lost the plot! You can make copies of the test using the PDF links below. You can put the answers up later on the smart board.

Mathspig April Fools Maths Test 1

Mathspig April Fools Maths Test 2

Mathspig April Fools Maths Test ANSWER

41 Maths things to do before you’re 12

“A growing body of research shows us that outdoor play leads to better physical and mental health, has positive effects on cognitive function and learning, and reduces the incidence of behavioural problems.” Maria Zotti, Nature Play, SA.

Peter Dunstan, Principal Kilkenny PS, SA, writes in SAPPA magazine, Primary Focus, that outdoor play fosters “wonderment, independence and freedom” as well as “social skills, imagination, creativity and problem solving”.

Inspired by SAPPA and NaturePlay,  Mathspig has produced her own outdoorsy maths list:

 

References:

7. Robin Hood Give us your best shot.

9. You can measure the volume of your lungs by blowing one breath into a balloon and pushing it into a full bucket of water. Measure the overflow.

15: Outdoor Maths: Times Tables

21. Light intensity links. Here and here.

25.  Sound Volume Measurement

36. Killer heels that really kill.