summarize the points made in the lecture, being sure to explain how they challenge the points that why Greeks never built burning mirror to burn the Roman ships mentioned in the reading passage
In the reading passage, the author discusses that burning mirror is just a myth and the Greekes of Syracuse never really built such a device to burn the Roman ships, while the lecture claims that what the passage state is not convincing and disputes those ideas presented in the passsage with several proofs.
Firstly, according to the reading passage, it is suggested that the ancient Greeks not technologically enough to make such a device because the mirror should have to be several meters wide and have a very precise parabolic. In contrast, the professor argues in the lecture that a burning mirror could be made with dozens of small individually flat pieces of copper instead of a large single sheet of copper. Moreover, the Greeks knew the properties of the parabola and thus they could direct the assembly of small mirror pieces into the burning mirrors.
In addition, the statement in the reading material indicates that the burning mirror would have taken a long time to set the ships on fire. The experiment had shown that the device concentrating the Sun's rays on a wooden object 30 meters away took ten minutes to set the object on fire and the object had to be unmoving during that time. On the contrary, the professor points out that the experiment just tested the wood maternial which was on fire needed ten minutes. However there is another materinal called pitch that would get fire quickly within seconds. Once it catches fire, it would rapidly spread to other places.
Finally, the author of the reading claims that the Greeks already had flaming arrows so that they had no reason to build a weapon like a burning mirror. However, the speaker argues that burning mirror to be more effective. Roman soliders were familiar with flaming arrows and knew how to deal with them, but they could not see the burningrays form a mirror and would be surprised at when and where the fire would start.
Grammar and spelling errors:
Line 3, column 469, Rule ID: SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA[1]
Message: Did you forget a comma after a conjunctive/linking adverb?
Suggestion: However,
...l which was on fire needed ten minutes. However there is another materinal called pitch...
^^^^^^^
Line 4, column 47, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...y, the author of the reading claims that the Greeks already had flaming arrows so...
^^
Transition Words or Phrases used:
but, finally, first, firstly, however, moreover, really, second, so, thus, while, in addition, in contrast, on the contrary
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 11.0 10.4613686534 105% => OK
Auxiliary verbs: 9.0 5.04856512141 178% => OK
Conjunction : 9.0 7.30242825607 123% => OK
Relative clauses : 15.0 12.0772626932 124% => OK
Pronoun: 20.0 22.412803532 89% => OK
Preposition: 40.0 30.3222958057 132% => OK
Nominalization: 4.0 5.01324503311 80% => OK
Performance on vocabulary words:
No of characters: 1583.0 1373.03311258 115% => OK
No of words: 330.0 270.72406181 122% => OK
Chars per words: 4.79696969697 5.08290768461 94% => OK
Fourth root words length: 4.26214759535 4.04702891845 105% => OK
Word Length SD: 2.36697704867 2.5805825403 92% => OK
Unique words: 172.0 145.348785872 118% => OK
Unique words percentage: 0.521212121212 0.540411800872 96% => OK
syllable_count: 486.9 419.366225166 116% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 2.0 3.25607064018 61% => OK
Article: 8.0 8.23620309051 97% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 5.0 2.5761589404 194% => OK
Performance on sentences:
How many sentences: 12.0 13.0662251656 92% => OK
Sentence length: 27.0 21.2450331126 127% => The Avg. Sentence Length is relatively long.
Sentence length SD: 66.6333249958 49.2860985944 135% => OK
Chars per sentence: 131.916666667 110.228320801 120% => OK
Words per sentence: 27.5 21.698381199 127% => OK
Discourse Markers: 10.25 7.06452816374 145% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 1.0 4.33554083885 23% => More positive sentences wanted.
Sentences with negative sentiment : 9.0 4.45695364238 202% => Less negative sentences wanted.
Sentences with neutral sentiment: 2.0 4.27373068433 47% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.305339481938 0.272083759551 112% => OK
Sentence topic coherence: 0.102211734672 0.0996497079465 103% => OK
Sentence topic coherence SD: 0.0716052045548 0.0662205650399 108% => OK
Paragraph topic coherence: 0.182054081849 0.162205337803 112% => OK
Paragraph topic coherence SD: 0.0600764363624 0.0443174109184 136% => OK
Essay readability:
automated_readability_index: 14.9 13.3589403974 112% => OK
flesch_reading_ease: 52.53 53.8541721854 98% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 12.6 11.0289183223 114% => OK
coleman_liau_index: 10.86 12.2367328918 89% => OK
dale_chall_readability_score: 8.09 8.42419426049 96% => OK
difficult_words: 65.0 63.6247240618 102% => OK
linsear_write_formula: 17.5 10.7273730684 163% => OK
gunning_fog: 12.8 10.498013245 122% => OK
text_standard: 13.0 11.2008830022 116% => OK
What are above readability scores?
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Write the essay in 20 minutes.
Rates: 80.0 out of 100
Scores by essay e-grader: 24.0 Out of 30
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Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.