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Answer the following statement true (T) or false (F)
True
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Matter Waves: An electron is accelerated from rest through a potential difference. After acceleration the electron has a wavelength of 880 nm. What is the potential difference responsible for the acceleration of the electron? (h = 6.626 × 10-34 J ? s, melectron = 9.11 × 10-31 kg, e = 1.6 10-19 C)
A. 1.9 × 10-6 V B. 1.7 × 10-6 V C. 2.2 × 10-6 V D. 2.5 × 10-6 V
Minimal orbital speed about Earth is about 8 km/s, and about the Moon is
A) less than 8 km/s. B) more than 8 km/s. C) about 8 km/s.
Two light bulbs, a thick-filament one and a thin-filament one, are connected in series to a battery. The voltage is greater across the lamp with the
A) thick filament. B) thin filament. C) same for both
The quantity that is quantized in the oscillating atoms of a blackbody is
a. angular momentum. b. energy. c. the emission spectrum. d. the absorption spectrum. e. the wave function.