The total mass of a galaxy tends to be only slightly larger than the visible mass
Indicate whether the statement is true or false
FALSE
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A ________ happens when a white dwarf in a binary system accumulates more mass than the Chandrasekhar limit.
A. Type II supernova B. Pulsar C. Nova D. Type Ia supernova E. None of these choices is correct.
In latitudes where the subsurface layer of soil always remains frozen, the frozen layer is called
a. an aquifer. b. the frost table. c. a glacier. d. permafrost.
Suppose you watch a leaf bobbing up and down as ripples pass it by in a pond. You notice that it does two full up and down bobs each second. Which statement is true of the ripples on the pond?
A) They have a wavelength of two cycles per second. B) They have a frequency of 4 hertz. C) We can calculate the wavelength of the ripples from their frequency. D) They have a frequency of 2 hertz.
If the potential is given by V = xy - 3 z-2, then the electric field has a y-component of
A) x + y - 6 z-3. B) -y. C) -x. D) x + y. E) cannot be determined