Car manufacturers and governments have been eagerly seeking a replacement for the automobile's main source of power, the internal-combustion engine. By far the most promising alternative source of energy for cars is the hydrogen-based fuel-cell engine, which uses hydrogen to create electricity that, in turn, powers the car. Fuel-cell engines have several advantages over internal-combustion engines and will probably soon replace them.
One of the main problems with the internal-combustion engine is that it relies on petroleum, either in the form of gasoline or diesel fuel. Petroleum is a finite resource; someday, we will run out of oil. The hydrogen needed for fuel-cell engines cannot easily be depleted. Hydrogen can be derived from various plentiful sources, including natural gas and even water. The fact that fuel-cell engines utilize easily available, renewable resources makes them particularly attractive.
Second, hydrogen-based fuel cells are attractive because they will solve many of the world's pollution problems. An unavoidable by-product of burning oil is carbon dioxide, and carbon dioxide harms the environment. On the other hand, the only byproduct of fuel-cell engines is water.
Third, fuel-cell engines will soon be economically competitive because people will spend less money to operate a fuel-cell engine than they will to operate an internal-combustion engine. This is true for one simple reason: a fuel-cell automobile is nearly twice as efficient in using its fuel as an automobile powered by an internal-combustion engine is. In other words, the fuel-cell powered car requires only halfthe fuel energy that the internal-combustion powered car does to go the same distance.
The reading states that Fuel-cell engines have several advantegous over internal-combustion engins and they can be a good replacement for them and provides three reasons of support. However, the professor explained that it is true that internal-combustion engins pollute the air and are finite resorce but hydrogen is not a godd replacement for them and it is not available as easily as the reading explained and refutes each of the author's reasons.
First, the article claims that internal-combustion engins relies on petroleum which is a finite resource and indespite hydrogen can be driven from various plentiful sources. The professor refutes this point by saying that hydrogen is not easily usable. He states that to obtaine pure liquid hydrogen we need a really hard technology. He mentioned that for producing pure hydrogen we have to keep it in a really cold invironment which is not practical and easily feasible.
Second, the reading posits that hydrogen-based fuell cells can solve the world's pollution problem as the only byprduct of the fuel-cell engines are water. However, the professor claims that this is not a good solution for the pollution problem which internal-combustion engins brings to the environmen. According to professor purification of the hydrogen and creation of oil produce lots of pollution.
Third, the article avers that fuel-cell engines are economically competitive with current engines and people will spend less money to operate this engines. The professor opposes this point by explaining that operating these engines are not cost less than internal-combustion engins. Based on the lecture manufactering fuel-cells is really expensive as they need some kinds of metal that are really expensive and without that metal, the automobile cannot produce the required electericity which is need to start the automobile.
- Some people believe that university students should be required to attend classes. Others believe that going to classes should be optional for students. Which point of view do you agree with? Use specific reasons and details to explain your answer. 82
- Do you agree or disagree with the following statement?Educating children is a more difficult task today than it was in the past because they spend so much time on cell phone, online games, and social networking Web site.Use specific reasons and examples t 73
- Standardized tests are exams given to students at the end of each academic year. The results are used to determine whether or not students move to the next grade level. As our society places more emphasis on education, many school districts, along with th 83
- It is better for children to grow up in the countryside than in a big city. Do you agree or disagree? Use specific reasons and examples to develop your essay. 60
- Car manufacturers and governments have been eagerly seeking a replacement for the automobile's main source of power, the internal-combustion engine. By far the most promising alternative source of energy for cars is the hydrogen-based fuel-cell engine, wh 83
Grammar and spelling errors:
Line 5, column 74, Rule ID: POSSESIVE_APOSTROPHE[1]
Message: Possible typo: apostrophe is missing. Did you mean 'worlds'' or 'world's'?
Suggestion: worlds'; world's
...ydrogen-based fuell cells can solve the worlds pollution problem as the only byprduct ...
^^^^^^
Line 5, column 250, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...solution for the pollution problem which internal-combustion engins brings to the...
^^
Line 7, column 143, Rule ID: THIS_NNS[1]
Message: Did you mean 'these'?
Suggestion: these
...people will spend less money to operate this engines. The professor opposes this poi...
^^^^
Discourse Markers used:
['but', 'first', 'however', 'if', 'really', 'second', 'so', 'third', 'it is true']
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance in Part of Speech:
Nouns: 0.257328990228 0.261695866417 98% => OK
Verbs: 0.166123778502 0.158904122519 105% => OK
Adjectives: 0.100977198697 0.0723426182421 140% => OK
Adverbs: 0.0618892508143 0.0435111971325 142% => OK
Pronouns: 0.0358306188925 0.0277247811725 129% => OK
Prepositions: 0.114006514658 0.128828473217 88% => OK
Participles: 0.0293159609121 0.0370669169778 79% => OK
Conjunctions: 3.23740548446 2.5805825403 125% => OK
Infinitives: 0.0195439739414 0.0208969081088 94% => OK
Particles: 0.0 0.00154638098197 0% => OK
Determiners: 0.114006514658 0.128158765124 89% => OK
Modal_auxiliary: 0.0162866449511 0.0158828679856 103% => OK
WH_determiners: 0.0162866449511 0.0114777025283 142% => OK
Vocabulary words and sentences:
No of characters: 1860.0 1645.83664459 113% => OK
No of words: 288.0 271.125827815 106% => OK
Chars per words: 6.45833333333 6.08160592843 106% => OK
Fourth root words length: 4.11953428781 4.04852973271 102% => OK
words length more than 5 chars: 0.434027777778 0.374372842146 116% => OK
words length more than 6 chars: 0.329861111111 0.287516216867 115% => OK
words length more than 7 chars: 0.222222222222 0.187439937562 119% => OK
words length more than 8 chars: 0.159722222222 0.113142543107 141% => OK
Word Length SD: 3.23740548446 2.5805825403 125% => OK
Unique words: 143.0 145.348785872 98% => OK
Unique words percentage: 0.496527777778 0.539623497131 92% => More unique words wanted or less content wanted.
Word variations: 48.5819338162 53.8517498576 90% => OK
How many sentences: 12.0 13.0529801325 92% => OK
Sentence length: 24.0 21.7502111507 110% => OK
Sentence length SD: 55.7319975916 49.3711431718 113% => OK
Chars per sentence: 155.0 132.220823453 117% => OK
Words per sentence: 24.0 21.7502111507 110% => OK
Discourse Markers: 0.75 0.878197800319 85% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 3.0 3.39072847682 88% => OK
Readability: 56.9861111111 50.5018328374 113% => OK
Elegance: 1.51851851852 1.90840788429 80% => OK
Coherence and Cohesion:
Essay topic to essay body coherence: 0.379809649328 0.549887131256 69% => OK
Sentence sentence coherence: 0.150344806856 0.142949733639 105% => OK
Sentence sentence coherence SD: 0.0957876238018 0.0787303798458 122% => OK
Sentence paragraph coherence: 0.628695555245 0.631733273073 100% => OK
Sentence paragraph coherence SD: 0.11222342882 0.139662658121 80% => OK
Sentence topic coherence: 0.18367797072 0.266732575781 69% => OK
Sentence topic coherence SD: 0.0894920058492 0.103435571967 87% => OK
Paragraph paragraph coherence: 0.366588453318 0.414875509568 88% => OK
Paragraph paragraph coherence SD: 0.0687515529548 0.0530846634433 130% => OK
Paragraph topic coherence: 0.284593817032 0.40443939384 70% => OK
Paragraph topic coherence SD: 0.083553536658 0.0528353158467 158% => OK
Task Achievement:
Sentences with positive sentiment : 3.0 4.33554083885 69% => OK
Sentences with negative sentiment : 6.0 4.45695364238 135% => OK
Sentences with neutral sentiment: 3.0 4.26048565121 70% => OK
Positive topic words: 3.0 3.49668874172 86% => OK
Negative topic words: 6.0 3.62251655629 166% => OK
Neutral topic words: 3.0 3.1766004415 94% => OK
Total topic words: 12.0 10.2958057395 117% => OK
What are sentences with positive/Negative/neutral sentiment?
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Rates: 83.3333333333 out of 100
Scores by essay e-grader: 25.0 Out of 30
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Note: This is not the final score. 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.