The figure below represents a string which has a heavy section and a light section. The mass per unit length of the heavy section is 16 times as large as the mass per unit length of the light section. When the string is under tension, the speed of a pulse traveling in the heavy section is ____ times the speed of that same pulse traveling in the light section
a.
b.
c.
d. 2
e. 4
b
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What is the intensity of a sound with a measured intensity level of 85 dB? (I0 = 10?12 W/m2)
a. 1.3E–6 W/m2 b. 3.2E–4 W/m2 c. 8.5E–6 W/m2 d. 2.0E–3 W/m2 e. 8.5E–3 W/m2
Which of the following is NOT an outer planet?
A. Uranus B. Pluto C. Jupiter D. Saturn E. Neptune
A(n) ____ is a commonly accepted set of scientific ideas and assumptions
a. theory b. paradigm c. hypothesis d. natural law e. model
The "bottom-up" approach to creating artificial life starts
A) with simple bacteria and attempts to add DNA sequences to them to make them more complex B) with advanced robots and attempts to make them able to reproduce C) in the laboratory with the raw ingredients of life, and seeks to reproduce life in much the same way that it presumably originated billions of years ago D) with existing organisms and genetically strips them down, then tries to rebuild them into new species