How was de Broglie's theory of the waviness of matter first confirmed?
A) By allowing two electrons to pass through each other.
B) By passing an electron beam through a metal foil and observing the pattern of impacts on a screen.
C) By careful microscopic investigation of individual electrons.
D) By passing a neutron beam through a double-slit experiment and observing the pattern of impacts on a screen.
E) By passing an electron beam through a single slit and observing the pattern of impacts on a screen.
B
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A 70-kg stunt artist rides in a rocket sled which slides along a flat inclined surface. At an instant when the sled's acceleration has a horizontal component of 6.0 m/s2 and a downward component of 2.8 m/s2, what is the magnitude of the force on the rider by the sled?
a. 0.83 kN b. 0.98 kN c. 0.65 kN d. 0.68 kN e. 0.72 kN
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What will be an ideal response?
When Rutherford directed a stream of alpha particles at a gold foil, some particles
A) bounced back. B) continued through the foil. C) deflected at a variety of angles. D) all of the above E) none of the above
As the speed of an object decreases, its wavelength
a. remains unchanged. b. decreases. c. increases. d. is zero.