Question
in The Incredible Talking Machine
by
Randall Stross
In paragraph 2, how does the author help the reader understand how ultrasound works?
A
by describing the features of new technology
B
by using familiar concepts to explain new technology
C
by explaining how researchers discovered new technology
D
by providing additional resources about the new technology
(b)
Part B
Which sentence from paragraph 2 best supports the answer to Part A?
A
"At that moment, you are standing in a cylinder of sound."
B
"Whereas a loudspeaker broadcasts sound in all directions, the way a lightbulb radiates light, a directional speaker shines a beam of waves akin to a spotlight."
C
"The beam consists of ultrasound waves, which humans cannot hear, but which can emit audible tones as they interact with air."
D
"By describing these interactions mathematically, engineers can coax a beam to exude voice, music or any other sound."
by
Randall Stross
In paragraph 2, how does the author help the reader understand how ultrasound works?
A
by describing the features of new technology
B
by using familiar concepts to explain new technology
C
by explaining how researchers discovered new technology
D
by providing additional resources about the new technology
(b)
Part B
Which sentence from paragraph 2 best supports the answer to Part A?
A
"At that moment, you are standing in a cylinder of sound."
B
"Whereas a loudspeaker broadcasts sound in all directions, the way a lightbulb radiates light, a directional speaker shines a beam of waves akin to a spotlight."
C
"The beam consists of ultrasound waves, which humans cannot hear, but which can emit audible tones as they interact with air."
D
"By describing these interactions mathematically, engineers can coax a beam to exude voice, music or any other sound."