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Posts tagged with dimensions

Back to the Future Pt2

December16

Ben Tippett, a mathematics and physics instructor at UBC’s Okanagan campus, recently published a study about the feasibility of time travel. Tippett, whose field of expertise is Einstein’s theory of general relativity, studies black holes and science fiction when he’s not teaching. Using math and physics, he has created a formula that describes a method […]

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Flat out in 3 or 4 Dimensions…

August23

How many dimensions are there in our universe? From 2009 (http://phys.org/news/2009-02-fourth-dimension.html): “Creating a unified theory of quantum gravitation is often considered to be the “Holy Grail” of modern science. Daniel Grumiller (left) from the Institute of Theoretical Physics, Vienna University of Technology, Austria, can now at least unravel some of the mysteries of quantum gravitation. […]

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Geometric Squaring for accuracy…

February25

Spot the error in this student’s working: You spotted it? Yes, it is obvious that this student has forgotten to do the last problem correctly and worked out 7 x 2 when they should have done 7 x 7 (source here). Perhaps it is better to think of “Squared Numbers” as geometric squares. After all, […]

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Do we live in the 11th dimension?

February16

Perhaps! As we consider the number of dimensions that exist we need to explore the properties outside our normal spacetime experience and look at the structure of the universe. In fact, Astronomy and Mathematics are close cousins. Click on the magazine to find out one suggested answer to the question in this post.

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Another Dimension to Dimensions

February15

Another way to view dimensions can be seen in this composite photo. When a 3D object touches a 2D space it leaves a 2D impression (the points of contact between the fingertips and the flat surface). If we lived in a 2D time-space we would not see the person or hands and fingers as 3D […]

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How Many Dimensions Exist?

February15

Yes, it was an inevitable consequence of having a look at Fractals. I wonder how many dimensions actually exist?? We tend to view our world through the eyes of 4D – length, width, height and time, but some scientists suggest that there could be up to 11D in our universe and that some dimensions may […]

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Post Support

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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