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Posts tagged with measurement

Another Numbers Matter

June19

In the news, this time another “numbers matter” from STUFF: “Think of the last time you used a set of scales. Or purchased something that had been weighed or measured before being packaged. Perhaps you’ve taken some medication today. Or bought chia seeds at the supermarket. Put petrol in your car. Posted a parcel. Poured […]

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The Earth Now Weighs 6 Ronnagrams!

November20

The Earth can now be said to weigh about six ronnagrams, instead of 6000 yottagrams. Jupiter can be described as having a mass of about 1.9 quettagrams, instead of just 1.9 million yottagrams. And an electron’s weight is one rontogram, or 0.001 yoctograms. The ability to more succinctly describe the weight of our planet and […]

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The Missing 49 Kms in New Zealand

October9

[article from Stuff] – Somewhere, somehow, 49 kilometres have gone missing in New Zealand. Government agencies don’t know where they are. Neither do a range of local boards, experts and transport policy wonks. But what we do know is this: at opposite ends of the country, in Bluff (in the south) and Cape Rēinga (in the […]

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Tallest Wave Ever Surfed, but How High?

May25

“Pro surfer Sebastian Steudtner (left) was on his board, bobbing in the waters off Nazaré, Portugal, when he saw a lone monster approaching, steadily growing as it rumbled closer. He nodded toward his jet ski driver and held the tow rope tightly. “I knew it,” Steudtner, 37, remembers thinking. “Get me this wave now.” As […]

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Measuring the Roof of the World

April15

The history of measuring the tallest mountain in the world stretches back to 1852. In Europe, Charles Dickens was publishing serialised instalments of his novel Bleak House. North America had started testing its first steam-powered fire engine. In Asia, the height of Mount Everest was a mystery. It is known only as “Peak XV”. Radhanath […]

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Concrete: The material that’s ‘too vast to imagine’

July4

A recent BBC article predicted that, if its rate of growth continues, concrete will overtake the total weight of Earth’s biomass sometime around 2040. Try to picture that in the mind’s eye: there is a day approaching soon when there will be a greater weight of concrete on Earth than every single tree in every forest, every fish […]

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Great Balls of (not) Fire, but rather Asteroids!

October25

An impressive comparison of asteroid sizes, in relation to New York City. See the full clip here More interesting asteroid analysis (including a spinning asteroid movie) for rock-hounds can be found here.

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Measurement 101

July21

Mathematics prides itself on accuracy, even when estimating values. Think what would happen if two builders were using the following tape measures on the same job! There would be uneven walls, or mismatched joins. This picture also raises the importance of quality control and many products today seem to lack good quality. Manufacturers rely upon […]

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It’s a small world after all

January20

Size matters to mathematicians, as well as scientists (another name for mathematicians). Last year, scientists (aka mathematicians) at York University recorded the radius of a proton at 0.833 femtometres, or just under one trillionth of a millimetre. It’s enough to make your head (like your protons) spin! Incidentally, and totally unrelated, H3 visited the Music […]

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What about Watts?

December13

Most of us have a basic understanding of power. Walking upstairs takes a certain level of effort, but when we add a large sack of potatoes to the shoulder it takes more energy. Power is commonly measured in watts. Variables here but riding a bike at a leisurely 15 mph on a flat windless road […]

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Post Support

Largest number between o and 1 million which does not contain the ‘n’ is 88

 

Rotation SAT Problem: Answer: 4 (see: https://www.youtube.com/watch?v=FUHkTs-Ipfg)

 

Which number has its letters in alphabetical order? Answer: F O R T Y

Hidden Rabbit? Clue: check the trees

How long for the stadium to fill? 45 minutes.

Where are you? the North Pole

Prize Object Puzzle: If Sue does not know where the prize is in the first question, it can’t be under the square. She must have been told it is under another shape. Apply this same logic to Colin. It is then obvious that the prize cannot be under a yellow object. That helps Sue eliminate her yellow shapes. Got the idea?

Algebra Puzzle: Answer = 1

Popular Math Problems Answers: 1, 1

Number of tabs? According to Lifehacker, the ideal number of tabs you should have open is nine. Yes, a single digit. To some, this is like playing a piano and only using a fraction of the notes!

Worst Graph? Where to start. What a visual mess and even some of the lines merge and are impossible to follow. A graph is a visual display of data, with the goal to identify trends or patterns. This is a spider’s web of information which fails to show a clear pattern at all. Solution? Well, different colors would help, or why not group in two or three graphs where trends are similar?

Number of different nets to make a cube is eleven – see this link

Homework Puzzle; The total value of the counters is 486, so halve this to get 243. Now, arrange the counters to equal this amount twice.

The graph on the left (Coronavirus) is for a time period of 30 days, while the one on the right (SARS) is for 8 months! Very poor graphical comparison and hardly relevant, unless it is attempting to downplay the seriousness of the coronavirus?

10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

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