The geometry of an ellipse is described by two numbers: the ____ which is half the longest diameter of the ellipse and the ____ which tells us the shape of the ellipse
a. radius, eccentricity
b. radius, deferent
c. semi-major axis, deferent
d. semi-major axis, epicycle
e. semi-major axis, eccentricity
e
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What will be an ideal response?
The density of Mars is very similar to that of the other terrestrial planets
Indicate whether the statement is true or false
Neptune has a larger fraction of methane in its atmosphere than Uranus
Indicate whether the statement is true or false
By using a compass to measure the magnetic field direction at various points adjacent to a long straight wire, you can show that the wire's magnetic field lines are
a. straight lines in space that go from one magnetic charge to another. b. straight lines in space that are parallel to the wire. c. straight lines in space that are perpendicular to the wire. d. circles that have their centers on the wire and lie in planes perpendicular to the wire. e. circles that have the wire lying along a diameter of the circle.