Which of the following is the largest?
a. the diameter of Earth
b. the diameter of the Moon
c. the diameter of the Sun
d. the diameter of Jupiter
e. the distance from Earth to the Sun
e
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Two very long parallel wires are a distance d apart and carry equal currents in opposite directions. The locations where the net magnetic field due to these currents is equal to zero are
A) midway between the wires. B) a distance d/2 to the left of the left wire and also a distance d/2 to the right of the right wire. C) a distance d to the left of the left wire and also a distance d to the right of the right wire. D) a distance d/ to the left of the left wire and also a distance d/ to the right of the right wire. E) The net field is not zero anywhere.
Venus is located
A) near the outer boundary of the Sun's habitable zone B) in the middle of the Sun's habitable zone C) near the inner boundary of the Sun's habitable zone D) outside the Sun's habitable zone
Does an electric field exert a force on a moving charged object? Assume the motion of the charged object is along the x axis and the field is in the y direction
1.yes 2.no
Star A and star B both have an absolute magnitude of 2.0, but star A has an apparent magnitude of 5.0 and star B has an apparent magnitude of 7.0. Which statement below is correct?
A) Star A appears brighter than star B, but actually star B and star A are the same brightness. B) Star B appears brighter than star A, but actually star B and star A are the same brightness. C) Star A and star B appear to have the same brightness, but actually star B is brighter than star A. D) Star A and star B appear to have the same brightness, but actually star A is brighter than star B. E) It is impossible to determine how bright these stars are or appear to be relative to one another, given the information above.