In 1974, a radio message was sent out from the Arecibo observatory in Puerto Rico. About how far has it gotten by now?
A) just beyond our Solar System
B) not even to the nearest stars
C) a small fraction of the distance across the Milky Way
D) almost to the center of the Milky Way
E) beyond the Milky Way, to the Andromeda galaxy
C) a small fraction of the distance across the Milky Way
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What will be an ideal response?
The normal mode of a resonating system is sinusoidally disturbed at a frequency . Assume that , where is the normal mode’s natural frequency. (a) What is the amplitude of the normal mode’s oscillation compared to its amplitude in the limit that the disturbance frequency goes to zero if is about 1.4 ?
A. Roughly zero
B. Roughly 
/30
C. Roughly /1.4
D. Roughly
E. Roughly 1.4
F. Roughly 30
T. Other (specify)
A racecar goes around a 200 m radius curve at a constant speed of 40 m/s. Its acceleration is __________
Fill in the blank(s) with correct word
Addition by 1. Components: The figure shows three vectors, src="https://sciemce.com/media/4/ppg__cp1pbb0313192044__f15g1q36g6.jpg" style="vertical-align: -5.0px;" />.
, 
, and 
, along with their magnitudes. Determine the magnitude and direction of the vector given by 
+ 
- 
Fill in the blank(s) with the appropriate word(s).