Which of the following helps astronomers conclude that the moon Miranda is no longer active?
A) Counting craters on its ovoids
B) Observing the intensity of an existing magnetic field
C) Its diameter and density
D) The average composition of its interior
A
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An 80.0-kg object is falling and experiences a drag force due to air resistance. The magnitude of this drag force depends on its speed, v, and obeys the equation What is the terminal speed of this object?
A) 6.45 m/s B) 72.2 m/s C) 34.2 m/s D) 12.6 m/s E) 47.3 m/s
Equipotential Surfaces: The equipotential surfaces for two spherical conductors are shown in the figure, with the value of potential marked on the line for each surface.(a) If the distance between points A and B is 2.5 cm what is the approximate intensity of the electric field between these two points?(b) If the distance between points C and D is 2.5 cm what is the approximate intensity of the electric field between these two points?
Fill in the blank(s) with the appropriate word(s).
Rosie is giving a presentation on pet grooming and has brought her own dog to show to the audience. she is not sure, however, the best way to incorporate the dog into her speech so that audience has the best experience. what should cora do?
Velma, inside a train moving at 20 m/s, throws a rock in the forward direction at 5 m/s. According to her the rock moves at 5 m/s. According to Mort, standing on Earth outside the train, the rock moves at [approximately] 25 m/s. Who is correct?
A) The Wizard of Oz. B) Velma, because she threw the rock. C) Mort, because he is standing on Earth. D) Both, relative to their own reference frames. E) Neither, because there is no universal "best" reference frame.