The clearest images of Uranus shown in the text have been obtained using:
A) the Hubble Space Telescope.
B) infrared ground- based telescopes at the Keck Observatory.
C) the Pioneer Spacecraft.
D) the Cassini Spacecraft.
E) visible light ground-based telescopes at the European Southern Observatory.
B
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What happens to the atomic number (Z) and the mass number (A) when a nucleus emits a gamma ray?
a. Z increases by 1; A is unchanged. b. Z is unchanged; A is unchanged. c. Z decreases by 1; A is unchanged. d. Z decreases by 2; A decreases by 4.
Solenoid: An ideal solenoid with 400 turns has a radius of 0.040 m and is 40 cm long. If this solenoid carries a current of 12 A, what is the magnitude of the magnetic field at the center of the solenoid? (?0 = 4? × 10-7 T ? m/A)
A. 16 mT B. 4.9 mT C. 15 mT D. 6.0 mT E. 9.0 mT
Matter Waves: If the momentum of an electron is 1.95 × 10-27 kg ? m/s, what is its de Broglie wavelength? (h = 6.626 × 10-34 J ? s)
A. 340 nm B. 210 nm C. 170 nm D. 420 nm E. 520 nm
Charge of uniform density (20 nC/m2) is distributed over a cylindrical surface (radius = 1.0 cm), and a second coaxial surface (radius = 3.0 cm) carries a uniform charge density of ?12 nC/m2. Determine the magnitude of the electric field at a point 4.0 cm from the symmetry axis of the two surfaces.
A. 0.45 kN/C B. 1.0 kN/C C. 0.73 kN/C D. 0.56 kN/C E. 2.3 kN/C