Series of characteristic spectral lines
When a sample of an unknown element is used as a target for the electron beam in an X-ray tube, it emits a series of characteristic spectral lines in which the two longest wavelengths are 0.0228 nm and 0.0192 nm. What is the element?
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A pendulum has a length of 50cm and a bob of mass of 20g. it is pulled to the side by 20 degrees and released. the energy is calculated with a choice of Ug=0 at the bottom of the swing. After many swings, the energy has decreased by 10%. find the
The velocity of a particle moving along the x axis is given for t > 0 by vx = (32.0t - 2.00t3) m/s, where t is in s. What is the acceleration of the particle when (after t = 0) it achieves its maximum displacement in the positive x direction?
Need to create two global varibles. The first currentTab, which will reference the current menu tab being dispalyed with a initial value of null, the second variable is maxZ which will store the z-index and it's initial value is 1.
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Mitochondria are thought to be the descendants of certain alpha-proteobacteria.
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