X-Ray Diffraction: Certain planes of a crystal of halite have a spacing of 0.399 nm. The crystal is irradiated by a beam of x-rays. First order constructive interference occurs when the beam makes an angle of 20° with the planes of the crystal surface. What is the wavelength of the x-rays?
A. 0.14 nm
B. 0.17 nm
C. 0.21 nm
D. 0.24 nm
E. 0.27 nm
Answer: E
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A. 3% B. 30% C. 70% D. 100%
Has there ever been a situation in which a given quantity of matter was turned completely into non-material forms of energy?
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Transverse waves travel with a speed of 105 m/s along a taut copper wire that has a diameter of 2.28 mm. What is the tension in the wire? (The density of copper is 8.93 g/cm3.)
a. 1 610 N b. 803 N c. 402 N d. 201 N e. 128 N
Write out the electron configuration for the ground state of the phosphorus atom, which has 15 electrons
What will be an ideal response?