Which domains of life consist entirely or microbes?
A) bacteria only
B) archaea and eukarya
C) bacteria and archaea
D) archaea only
C
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A horizontal force of 1000 N is needed to overcome the force of static friction between a level floor and a 250-kg crate. If g = 9.8 m/s2, what is the coefficient of static friction?
a. 4.0 c. 0.41 b. 0.51 d. 0.31
Which of the following wavelengths could NOT be present as a harmonic on a 2-m-long string?
A. 4 m B. 2 m C. 1 m D. 0.89 m E. 0.5 m
An object moving at a relativistic speed past a stationary observer appears to
A. have length expanded and have a slower clock. B. have length contracted and have a slower clock. C. have length expanded and have a faster clock. D. have length contracted and have a faster clock. E. be completely normal.
Going from medium mass nuclei to heavy nuclei, the average binding energy per nucleon
A) does not change. B) decreases. C) behaves randomly with no clear pattern. D) doubles. E) increases.