Exhibit 16-1
A graph of position versus time for an object oscillating at the free end of a horizontal spring is shown below.
?
?
Use this exhibit to answer the following question(s).
Refer to . The point at which the object has zero velocity and negative acceleration is
a.
A
b.
B
c.
C
d.
D
e.
E
b
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A microphone records sound produced from two speakers in a room with no other sound sources. If the intensity of one of the sound waves at a given location is 0.055 W/m2 and if the microphone receives a minimum intensity of 0.004 
when both speakers are active what is a possible value for the intensity of the other source at the microphone’s location?
A. Need more info to solve.
B. 0.088 
C. 0.051
D. 0.048
Astronomers have used observations from the Hubble Space Telescope to measure the rate at which the universe is expanding, and have estimated the age of the universe from that measured rate. Suppose the expansion turns out to be faster than current measurements indicate. In that case, our new estimate for the age of the universe would be
A) unaffected. B) younger (less time between now and the Big Bang). C) older (more time between now and the Big Bang).
What types of stars end their lives with supernovae?
A) all stars that are red in color B) all stars that are yellow in color C) high-mass stars that can continue to have core fusion until they have iron cores D) stars that are similar in mass to the Sun E) stars that have reached an age of 10 billion years
Compare and contrast the structure of the Earth and the Moon
What will be an ideal response?