The earliest (oldest) period in the Paleozoic era is the ______________
Fill in the blank(s) with correct word
Cambrian
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Briefly describe one of the three questions left unanswered by the standard Big Bang theory which are solved by inflation. That is, describe either the structure problem, the uniformity (or smoothness) problem, or the density (or flatness) problem
What will be an ideal response?
A hiker walks 200 m west and then walks 100 m north. In what direction is her resulting displacement?
a. north b. west c. northwest d. None of the answers is correct.
Work: A 500-kg elevator is pulled upward with a constant force of 5500 N for a distance of 50.0 m.(a) What is the work done by the 5500-N force?(b) What is the work done by gravity?(c) What is the net work done on the elevator?
What will be an ideal response?
A piece of plastic has a net charge of +2.00 ?C. How many more protons than electrons does this piece of plastic have? (e = 1.60 × 10-19 C)
A) 1.25 × 1013 B) 1.25 × 1019 C) 2.50 × 1013 D) 2.50 × 1019