VeritasKarishma wrote:
Vegita wrote:
Hey
VeritasKarishmaIn questions number 2, option E says, "pendulums can be synchronized with one another electronically" and this looks quite persuading as well. How did you eliminate this option?
Quote:
The primary pendulum swung freely in a vacuum chamber. Its only job was to synchronize the swing of the secondary pendulum, which was housed in a neighboring cabinet and drove the time-indicating mechanism. Every 30 seconds the secondary pendulum sent an electrical signal to give a nudge to the primary pendulum. In return, via an elaborate electromechanical linkage, the primary pendulum ensured that the secondary pendulum never got out of step.
Vegita - Note that the passage doesn't say that synchronised pendulums were not used before in any other instrument. So we don't know whether the Shortt clock was the first one to do it.
Also, we need identify a "discovery" that was made with the "use" of Shortt clock. So what was it that existed before but had not been discovered till Shortt clocks started getting used?
The passage tells us:
"The first indications of seasonal variations in the earth's rotation were gleaned by the use of Shortt clocks."
So there are seasonal variations in earth's rotation and these were discovered by the use of Shortt clocks - makes sense.
Thanks
VeritasKarishma ma'm for making this tough para looks so easy. I found that the answers are staring directly. I was looking at wrong place before and trying to make sense out of nothing.
Please give a suggestion
Sometimes specific lines could not be located in the passage when try to solve question.
Example: While solving Q2
2. According to the passage, the use of Shortt clocks led to the discovery that
I looked in 1st para and 2nd para where any information about shortt clocks was present.
I shortlisted A, B and D in my first reading
The went to .
After replacing the electromechanical linkage with modern optical sensing equipment, he measured the Shortt clock's rate against the observatory's atomic clocks for a month. to reject A.
went to "
In addition to causing the familiar ocean tides, both the sun and the moon raise tides in the solid body of the earth.The effect is to raise and lower the surface of the earth by about 30 centimeters. " to reject C
Then arrive at the text after hunting in the passage. Finally extracted the meaning.
While reading, many times I don't extract specific information. Hence while solving questions, in which we need to find out which option is true , if could not locate the right sentence for specific information then tends to get it wrong.
My Query:
How to improve efficiency of such questions and get to the right text instead of fishing the key words in the passage.
What can be done while reading the passage that we come back to the right content.
Please suggest .
VeritasKarishma GMATNinja