The Big Dipper is
a. a circumpolar constellation for southern hemisphere observers.
b. always on an observer's zenith.
c. an asterism.
d. only visible from the southern hemisphere.
e. a constellation.
C
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The parallax of the star 75 Leo is 0.10 and its apparent visual magnitude is +5.18 . The absolute visual magnitude of 75 Leo is ____________________
Fill in the blank(s) with correct word
A pocket of air moving north in the Northern Hemisphere will be deflected ________ by the rotation of Earth.
A. to the south B. upward to a higher altitude C. to the west D. to the east E. downward toward the surface
When two tectonic plates collide
A) they both stop moving. B) they always produce high mountain chains like the Himalayas. C) volcanoes always mark the boundary between them. D) they continue moving, producing a variety of large deformations. E) that region is safe from earthquakes now the plates are fixed.
A proton moving in a region of a space does not experience any acceleration in the direction of motion. Which of the following statements is correct with respect to this situation?
A) The electric and magnetic fields must be perpendicular to each other in that region. B) The electric and magnetic fields must be parallel to each other in that region. C) Both electric and magnetic fields must be zero in that region. D) The electric field must be zero but not the magnetic field in that region. E) The magnetic field must be zero but not the electric field in that region.