What was the purpose of the IAU establishing 88 official constellations?
a. To allow ancient stories of each constellation to be preserved
b. To name all constellations the same across any culture
c. To identify which constellation was created by which culture
d. To define boundaries for constellations including every part of the sky
e. To include additional, fainter stars within a constellation
d
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A motorcycle of mass 100 kilograms slowly rolls off the edge of a cliff and falls for three seconds before reaching the bottom of a gully. Its momentum upon hitting the ground is
A) 1,000 kg m/s. B) 2,000 kg m/s. C) 3,000 kg m/s. D) 4,000 kg m/s. E) 9,000 kg m/.
An ice cube with large air bubbles in it floats in a brim-full container of water. When the ice cube melts,
A) water spills over. B) no change in water level occurs. C) water level in the container goes down.
We have observed a comet strike Jupiter
Indicate whether the statement is true or false
An 800-N billboard worker stands on a 4.0-m scaffold supported by vertical ropes at each end. If the scaffold weighs 500 N and the worker stands 1.0 m from one end, what is the tension in the rope farthest from the worker?
a. 450 N c. 800 N b. 500 N d. 850 N