What do the size and shape of Widmanstätten patters indicate?
a. the age of the meteorite
b. that the molten metal of the meteorite cooled very slowly
c. the metallic content of the core of the meteorite
d. the origination of the meteorite
e. the number of organic compounds found within the meteorite
b
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Globular clusters are too small to have black holes at their center
Indicate whether the statement is true or false
An encounter in which a large galaxy absorbs a smaller galaxy is referred to as
A. "Galactic cannibalism". B. "Galactic assimilation". C. "Galactic absorption". D. "Galactic merger".
Contrast the atmosphere of Venus with its clouds
What will be an ideal response?
An electron moves in a region where the magnetic field is uniform and has a magnitude of 80 ?T. The electron follows a helical path which has a pitch of 9.0 mm and a radius of 2.0 mm. What is the speed of this electron as it moves in this region?
a. 48 km/s b. 28 km/s c. 20 km/s d. 35 km/s e. 8.0 km/s