A typical E. coli bacterium is measured in microns. Which of the following is a representation of a micron?
A) 1 × 10-15
B) 1 × 10-12
C) 1 × 10-9
D) 1 × 10-6
E) 1 × 10-3
D
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The discovery of Neptune was fundamentally different from the discovery of Uranus
a. True b. False Indicate whether the statement is true or false
Michael and Misty are standing motionless together on the ice at the center of a very slippery frozen pond. Michael (mass 75. kg) pushes Misty (46. kg), giving her an acceleration of 1.8 m/s2 for 0.17 s while they were in contact
(a) What is Michael's acceleration? (b) Who exerts the greater force on the other? (c) What is Michael's speed relative to Misty?
What is the efficiency of a heat engine whose thermal energy input is 400 J and whose exhaust is 300 J?
A) 75% B) 50% C) 175% D) 25% E) 33%
Standing Waves on a String: A string of linear density 1.5 g/m is under a tension of 20 N. What should be its length if its fundamental resonance frequency is 220 Hz?
A. 0.26 m B. 0.96 m C. 1.1 m D. 1.2 m