Posted by sherwin on Mar 14, 2017 in Uncategorized | 0 comments

The speed of light is generally rounded down to 186,000 miles per second. In exact terms it is 299,792,458 m/s (metres per second – that is equal to 186,287.49 miles per second). The speed of light in a vacuum is a constant: 300,000km a second. However, light does not always travel through a vacuum. In […]

Posted by sherwin on Dec 30, 2016 in Uncategorized | 0 comments

Isotopes are variants of a particular chemical element which differ in neutron number. All isotopes of a given element have the same number of protons in each atom. The term isotope is formed from the Greek roots isos (ἴσος “equal”) and topos (τόπος “place”), meaning “the same place”; thus, the meaning behind the name is […]

Posted by sherwin on Dec 30, 2016 in Uncategorized | 0 comments

The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current. It was discovered by Edwin Hall in 1879.[1] The Hall coefficient is defined as the ratio of the induced electric field to […]

Posted by sherwin on Dec 28, 2016 in Uncategorized | 0 comments

ax2 + bx + c = y Suppose you have ax2 + bx + c = y, and you are told to plug zero in for y. The corresponding x-values are the x-intercepts of the graph. So solving ax2 + bx + c = 0 for x means, among other things, that you are trying […]

Posted by sherwin on Dec 20, 2016 in Uncategorized | 0 comments

x2 + 3x – 4 = 0 For the Quadratic Formula to work, you must have your equation arranged in the form “(quadratic) = 0“. Also, the “2a” in the denominator of the Formula is underneath everything above, not just the square root. And it’s a “2a” under there, not just a plain “2“. Make […]