The reading discusses hydrogen fuel cells as an alternative to petroleum used currently in internal-combustion engines and provides three reasons. However, the speaker thinks the reading is too optimistic and opposes each benefit mentioned in the reading.
First, the reading states that the internal-combustion engines rely on a finite source of energy, but the hydrogen needed for hydrogen fuel cells is hard to deplete. The professor explains that hydrogen cannot be used as its natural form directly and needs a process to make it liquid. She also mentions that hydrogen should be preserved in a special condition and temperature.
Second, the reading states that using hydrogen will solve world pollution problems. The speaker disagrees this statement because she believes that hydrogen purification process causes a lot of air pollution.
Third, the reading says that fuel-cell engines will soon become economically competitive but the professor explains that since hydrogen fuel-cells need platinum to convert chemical energy into electricity, and platinum is a costly material, this engine cannot become a competitive alternative soon. She asserts that until now no replacement is found for platinum.
Transition Words or Phrases used:
also, but, first, however, if, second, so, third
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 6.0 10.4613686534 57% => More to be verbs wanted.
Auxiliary verbs: 6.0 5.04856512141 119% => OK
Conjunction : 7.0 7.30242825607 96% => OK
Relative clauses : 8.0 12.0772626932 66% => More relative clauses wanted.
Pronoun: 15.0 22.412803532 67% => OK
Preposition: 13.0 30.3222958057 43% => More preposition wanted.
Nominalization: 8.0 5.01324503311 160% => OK
Performance on vocabulary words:
No of characters: 1036.0 1373.03311258 75% => OK
No of words: 182.0 270.72406181 67% => More content wanted.
Chars per words: 5.69230769231 5.08290768461 112% => OK
Fourth root words length: 3.67297393991 4.04702891845 91% => OK
Word Length SD: 3.08540823754 2.5805825403 120% => OK
Unique words: 111.0 145.348785872 76% => More unique words wanted.
Unique words percentage: 0.60989010989 0.540411800872 113% => OK
syllable_count: 321.3 419.366225166 77% => OK
avg_syllables_per_word: 1.8 1.55342163355 116% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 3.0 3.25607064018 92% => OK
Article: 7.0 8.23620309051 85% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 2.0 1.51434878587 132% => OK
Preposition: 0.0 2.5761589404 0% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 9.0 13.0662251656 69% => Need more sentences. Double check the format of sentences, make sure there is a space between two sentences, or have enough periods. And also check the lengths of sentences, maybe they are too long.
Sentence length: 20.0 21.2450331126 94% => OK
Sentence length SD: 65.2891006728 49.2860985944 132% => OK
Chars per sentence: 115.111111111 110.228320801 104% => OK
Words per sentence: 20.2222222222 21.698381199 93% => OK
Discourse Markers: 5.33333333333 7.06452816374 75% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 0.0 4.19205298013 0% => OK
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 4.0 4.45695364238 90% => OK
Sentences with neutral sentiment: 1.0 4.27373068433 23% => More facts, knowledge or examples wanted.
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.170089539333 0.272083759551 63% => OK
Sentence topic coherence: 0.0637570960371 0.0996497079465 64% => OK
Sentence topic coherence SD: 0.0910818222251 0.0662205650399 138% => OK
Paragraph topic coherence: 0.105942462302 0.162205337803 65% => OK
Paragraph topic coherence SD: 0.0702806660895 0.0443174109184 159% => OK
Essay readability:
automated_readability_index: 15.5 13.3589403974 116% => OK
flesch_reading_ease: 34.26 53.8541721854 64% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 13.5 11.0289183223 122% => OK
coleman_liau_index: 15.72 12.2367328918 128% => OK
dale_chall_readability_score: 9.49 8.42419426049 113% => OK
difficult_words: 56.0 63.6247240618 88% => OK
linsear_write_formula: 11.0 10.7273730684 103% => OK
gunning_fog: 10.0 10.498013245 95% => OK
text_standard: 16.0 11.2008830022 143% => OK
What are above readability scores?
---------------------
Rates: 85.0 out of 100
Scores by essay e-grader: 25.5 Out of 30
---------------------
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.