Which of these things is NOT a model in the sense used in the textbook?
a. Someone who is employed to appear in advertisements of merchandise.
b. A guess about the contents of a box based on the weight of the box and the sounds it makes when shaken.
c. A mathematical equation describing an observation of an unknown process.
d. An analogy to a known process or object.
e. A theory of what your cousin might have put in a box she sent you for your birthday.
a
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Answer the following statement true (T) or false (F)
A stable cloud colliding with a shock wave can be compressed and disrupted into fragments
Indicate whether the statement is true or false
A sound source approaches a stationary observer. The frequency heard by the observer is
A) higher than the source. B) lower than the source. C) the same as that of the source. D) equal to zero. E) impossible to predict.
Newton's Second Law in 1 Dimension: If a net force accelerates a 4.5-kg tool at 40 m/s2, what acceleration would that same net force give to an 18-kg tool?
A. 180 m/s2 B. 10 m/s2 C. 160 m/s2 D. 9.8 m/s2 E. 32 m/s2