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Posts tagged with gravity

Putting a spring into your Math journey


If your class did well on their last math test, does that mean you are a smart class, or does it mean that the test was easy? Well, that might not be easy to answer, but here is a video that will explain how forces work with springs, and that might put a spring in […]

Flat out in 3 or 4 Dimensions…


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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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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