A C note (f = 256 Hz) is sounded on a piano. If the length of the piano wire is 1.8 m and its mass density is 2.2 g/m, what is the tension in the wire?
a. 6.4E+1 N
b. 1.4E+2 N
c. 1.9E+3 N
d. 1.1E+3 N
e. 5.6E+2 N
c
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Identify a true statement about quasars
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Suppose we discover a new comet on an orbit that brings it closer to the Sun than Mercury every 125 years. What can we conclude?
A) It has a coma and tail during most of each orbit. B) It came from the Kuiper belt. C) It has been on its current orbit for only a very short time compared to the age of our solar system. D) It came from the Oort cloud.
The value of the momentum of a system is the same at a later time as at an earlier time if there are no
a. collisions between particles within the system. b. inelastic collisions between particles within the system. c. changes of momentum of individual particles within the system. d. internal forces acting between particles within the system. e. external forces acting on particles of the system.
What makes Europa the most likely place extraterrestrial life will be found in our solar system?
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