Based on what you learn about jovian moons by watching the videos or reading your textbook, what types of evidence for recent or ongoing geological activity have been observed on one or more jovian moons?
a. ice crystals being sprayed out into space
b. surfaces with very few impact craters
c. river valleys feeding into surface lakes of very cold liquids
d. active volcanoes
e. river valleys feeding into surface lakes of liquid water
f. large, violent storms swirling in counterclockwise directions
Ans:
a. ice crystals being sprayed out into space
b. surfaces with very few impact craters
c. river valleys feeding into surface lakes of very cold liquids
d. active volcanoes
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In what sense is our modern concept of an "atom" not accurate to its ancient meaning?
A) "Atom" means indivisible, but we now know that atoms are actually made of smaller particles. B) "Atom" means particle, but we now know that particles also have the properties of waves. C) "Atom" means identical, but we now know that not all atoms are the same. D) "Atom means solid, but we now know that atoms are mostly empty space.
A 400-turn circular coil (radius = 1.0 cm) is oriented with its plane perpendicular to a uniform magnetic field which has a magnitude that varies sinusoidally with a frequency of 90 Hz. If the maximum value of the induced emf in the coil is observed to be 4.2 V, what is the maximum value of the magnitude of the varying magnetic field?
a. 59 mT b. 62 mT c. 65 mT d. 68 mT e. 31 mT
A rod system with a uniform linear density of l = 4.40 kg/m has the shape shown in the figure, with rod 1 the vertical rod and rod 2 the horizontal rod. Rod 1 has length L1 = 8.00 m, and rod 2 has length L2 = 7.50 m. Neglect the diameter of the rods
?
What is the center of mass of the system?
a.
(1.29 m, 3.31 m)
b.
(2.06 m, 3.10 m)
c.
(3.31 m, 1.29 m)
d.
(3.10 m, 2.06 m)
Monochromatic light from a He-Ne laser (l = 632.8 nm) is incident on a diffraction grating containing 5 000 lines/cm. Determine the angle of the first-order maximum
a. 18.4° b. 39.2° c. 14.6° d. 27.7° e. 13.9°