Cold dust disks are _____________ disks around main-sequence stars, the dust of which is created by collisions among the planetesimals
Fill in the blank(s) with correct word
debris
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The most common rock forming minerals are composed of predominantly eight elements. These minerals are the
A) silicates, carbonates, oxides, sulfides, and sulfates. B) silicates, sulfides, and oxides. C) silicons, borates, oxides, sulfides, and carbonates. D) sulfates, oxides, and carbonates.
Magnetic field strength inside a current-carrying coil will be greater if the coil encloses a
A) vacuum. B) wooden rod. C) glass rod. D) rod of iron. E) none of the above
Which form of relativity applies for observers who are accelerating?
a. General relativity applies. b. Special relativity applies. c. Both special relativity and general relativity apply. d. Neither applies since the observer must be in an inertial frame to use either one.
SHM may be written y = A sin( ?t + ? ). What is the value of ?, the phase constant, when:
(a) the initial displacement is zero? (b) the initial displacement is A? (c) the initial velocity is zero?