An electron is bound in an infinite well (a box) of width 0.10 nm
If the electron is initially in the n = 8 state and falls to the n = 7 state, find the wavelength of the emitted photon. (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg)
2.2 nm
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This x-ray image shows a loop of hot gas above the surface of the Sun. Suppose we took another photo looking at the same place 1 hour later. What would we see?
A) The loop would look about the same as it does in this photo. B) The loop would have shot much higher up above the Sun's surface. C) The loop would have collapsed back down, so we would not see it anymore. D) The loop would have turned blue as the gas became hotter.
Stand a meterstick on its end and let it rotate to the floor. If you attach a heavy glob of clay to its upper end and repeat, the time to fall will be
A) shorter. B) longer. C) the same.
Coulomb's Law: Two tiny beads, each of mass 3.2 g, carry equal-magnitude charges. When they are placed 6.4 cm apart and released in outer space, they begin to accelerate toward each other at 538 m/s2. What is the magnitude of the charge on each bead? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 510 nC B. 44 nC C. 1800 nC D. 890 nC E. 1300 nC
______________ dating is used specifically to establish the absolute age of organic remains
Fill in the blank(s) with correct word