When Saturn is at Equinox, its rings will
A) double the planet's brightness.
B) appear face-on to the Earth.
C) lie perpendicular to the plane of the ecliptic.
D) contract closer to the planet's surface.
E) lie in the plane of the ecliptic.
E
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When two tectonic plates collide:
A) they both stop moving. B) they always produce high mountain chains like the Himalayas. C) volcanoes always mark the boundary between them. D) they continue moving, producing a variety of large deformations. E) that region is safe from earthquakes now the plates are fixed.
A bat chirps to locate a tasty lunch. The chirp travels at 340 m/s and its echo is heard 1 s after the chirp. Distance to the lunch is
A) 85 m. B) 170 m. C) 340 m.
The maximum possible value for the coefficient of static friction is:
a. 0.50 c. a value up to but not quite 1.00 b. 1.00 d. greater than 1.00
A block holding a ringing tuning fork oscillates back and forth, attached to a wall by a spring of spring on a horizontal, frictionless surface, with amplitude 17 cm. The mass of the tuning fork and block together is 0.75 kg. An observer who is situated so that the block’s direction of motion is either directly towards or away from him notes that the frequency he hears varies between 174 and 178 Hz. What is the spring constant for the spring ? The speed of sound at the time of the experiment is 340 m/s.
A. 390 N/m B. 203 N/m C. 1590 N/m D. 290 N/m E. 100 N/m