Author Question: The Carboniferous Period began about A) 475 million years ago B) 65 million years ago C) 360 ... (Read 85 times)

Marty · **on:** Jul 27, 2018

The Carboniferous Period began about

A) 475 million years ago
B) 65 million years ago
C) 360 million years ago
D) 542 million years ago

Question 2

A decoration, of mass M, is suspended by a string from the ceiling inside an elevator. The elevator is traveling UPWARD with a constant speed. The tension in the string is

A) greater than Mg.
B) less than Mg.
C) equal to Mg.
D) impossible to tell without knowing the speed.
E) impossible to tell without knowing the decoration mass.