If h = Planck's constant, the de Broglie wavelength of a particle of linear momentum p and kinetic energy KE is given by which of the following formulas?
A. p/h
B. KE/h
C. h/KE
D. h/p
E. h.p
Answer: D
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What other population of stars are relatively old?
A.) Open clusters. B.) OB associations. C.) Globular clusters. D.) Blue clusters. E.) Superclusters.
What is the magnetic force on a 2.0-m length of (straight) wire carrying a current of 30 A in a region where a uniform magnetic field has a magnitude of 55 mT and is directed at an angle of 20° away from the wire?
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Suppose the half-life of an isotope is 2 days. You purchase 10 grams of the isotope, but it was produced in a laboratory 4 days before it was delivered to you
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