Hayabusa was an example of which kind of mission?
A) lander
B) flyby
C) sample return
D) orbiter
C
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Photoelectric Effect: The work function of a certain metal is 1.90 eV. What is the longest wavelength of light that can cause photoelectron emission from this metal? (1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A. 231 nm B. 14.0 nm C. 62.4 nm D. 344 nm E. 654 nm
Lunar eclipses do not occur every full Moon, because the path of the ________ is tilted relative to the ________.
A. Sun; ecliptic B. Moon; ecliptic C. Earth; ecliptic D. Moon; equator
After an electron has been accelerated through a potential difference of 0.15 kV, what is its de Broglie wavelength? (e = 1.60 × 10-19 C, melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A) 0.10 nm B) 1.0 nm C) 1.0 mm D) 1.0 cm
The time required for one-half of a radioactive material to decay is called the
A) absolute age. B) half-life. C) date age. D) true-life.