The period of oscillation of a near-Earth satellite (neglecting atmospheric effects) is 84.3 min. What is the period of a near-Moon satellite? (RE = 6.37 × 10^6 m; RM = 1.74 × 10^6 m; ME = 5.98 × 10^24 kg; MM = 7.36 × 10^22 kg.)
a. 6.03 × 10^?3 min.
b. 0.713 min.
c. 84.3 min.
d. 108 min.
e. 140 min.
d
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The theory that the collapse of a massive star's iron core produces neutrinos was supported by
a. the size and structure of the Crab nebula. b. laboratory measurements of the mass of the neutrino. c. the brightening of supernovae a few days after they are first visible d. underground counts from solar neutrinos. e. the detection of neutrinos from the supernova of 1987.
Addition by 1. Components: Vector 
has a magnitude of 7.0 m and points 30° east of north. Vector 
has a magnitude of 5.0 m and points 30° west of south. The resultant vector 
+ 
is given by
A. 10.0 m at an angle 60° north of east. B. 10.0 m at an angle 30° east of north. C. 2.0 m at an angle 30° north of east. D. 2.0 m at an angle 60° north of east. E. 1.0 m at an angle 60° east of north
Which of the following energy storage modes for a gas molecule “switch on” fully at the lowest temperature?
A. The molecule’s kinetic energy B. The molecule’s rotational energy C. The molecule’s vibrational energy
A change in the direction of a wave when the wave finds an obstacle or an edge.
a) Refraction b) Standing wave c) Reflection d) Diffraction