In electron diffraction, an electron moving at speed v << c acts like
a. a particle with momentum mv.
b. a particle with position coordinate v/t.
c. a wave with wavelength v/t.
d. a wave with wavelength h/mv.
e. both a particle with position coordinate v/t and a wave with wavelength v/t.
D
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What is a key difference between the two planets Jupiter and Saturn and the two planets Neptune and Jupiter?
a. Size b. Composition c. Mass d. Color e. All of the above.
If a 1 kg mass is completely converted into energy, the amount of energy released would be __________
Fill in the blank(s) with correct word
A substance that increases the rate of a chemical reaction but is not consumed in the reaction is called
a. an oxidizing agent. b. a catalyst. c. an activation agent. d. a reducing agent.
Suppose it were possible to drill a frictionless cylindrical channel along a diameter of the Earth from one side of the Earth to another. A body dropped into such a channel will only feel the gravitational pull of mass within a sphere of radius equal to the distance of the mass from the center of the Earth. The density of the Earth is 5.52 × 10^3 kg/m3 and G = 6.67 × 10^?11 N/m2/kg2 . The
mass will oscillate with a period of a. 84.4 min. b. 169 min. c. 24.0 h. d. 1 130 h. e. 27.2 d.