What was the main difference between the time capsules carried on the Pioneer probes and the time capsules carried on the Voyager probes?
A) no difference, the time capsules were identical
B) the time capsule on Voyager contained a record with video and audio messages
C) the time capsule on Pioneer contained a record with video and audio messages
D) the time capsule on Voyager contained video, but no audio
Question 2
The Schwarzchild radius of a black hole is that radial distance from the center of a sphere within which not even light can escape. It was first discovered mathematically by Schwarzchild in 1916 after Einstein published his general relativity theory.
It can be calculated from a star's mass M as: R = 2GM/c2. If the mass of star G is twice as much as the mass of star H, the average density of star G compared to star H will be A) twice as much.
B) half as much.
C) four times as much.
D) one-fourth as much.
E) eight times as much.
Old Time Farm Shepherd
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
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Estimated number of new HIV infections per year over time period in Canada
The Geologic Time Scale