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 the fuel cell engines which uses hydrogen are better that current fuels for cars and provides three reasons of support. However, the professor explains that it is true that petroleum is finite source and it will finish soon but the hydrogen fuels are not a good solution for this problem and he opposes each of the author's reasons.
First, the reading claims that hydrogen based fuels are better because petroleum is a finite sorce and hydrogen is derived from various plentiful sources. The professor says that although Petroleum is a finite source, the hydrogen is not easily obtained. He also mentioned that producing hydrogen is technologically difficult and it needs to be in a environment with -43 degree.
Second, the article posits that hydrogen-based fuel cells will solve the pollution problem. However, the professor refutes this point by saying that producing hydrogen make lots of pollutant. According to professor it needs a lot of energy and lots of coil and oil are burnt to produce this hydrogen and the factories that produce hydrogen pollutant air a lot.
Third, the reading avers that using this kind of fuel help to save lots of money.The professor explains that manufacoring hydrogen is an expensive process. We also learn that this process needs platinium which is really expensive and it may cost more money to produce.
| Post date | Users | Rates | Link to Content |
|---|---|---|---|
| 2017-12-05 | mohammad.sh | 80 | view |
| 2016-09-14 | Alale7474 | 83 | view |
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- 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 76
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Grammar and spelling errors:
Line 1, column 312, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...are not a good solution for this problem and he opposes each of the authors reaso...
^^
Line 3, column 349, Rule ID: EN_A_VS_AN
Message: Use 'an' instead of 'a' if the following word starts with a vowel sound, e.g. 'an article', 'an hour'
Suggestion: an
...gically difficult and it needs to be in a environment with -43 degree. Second,...
^
Line 5, column 174, Rule ID: LOTS_OF_NN[1]
Message: Possible agreement error. The noun pollutant seems to be countable; consider using: 'lots of pollutants'.
Suggestion: lots of pollutants
... by saying that producing hydrogen make lots of pollutant. According to professor it needs a lot...
^^^^^^^^^^^^^^^^^
Line 5, column 241, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...ng to professor it needs a lot of energy and lots of coil and oil are burnt to pr...
^^
Line 5, column 247, Rule ID: LOTS_OF_NN[1]
Message: Possible agreement error. The noun coil seems to be countable; consider using: 'lots of coils'.
Suggestion: lots of coils
...professor it needs a lot of energy and lots of coil and oil are burnt to produce this hydro...
^^^^^^^^^^^^
Line 7, column 82, Rule ID: SENTENCE_WHITESPACE
Message: Add a space between sentences
Suggestion: The
...kind of fuel help to save lots of money.The professor explains that manufacoring hy...
^^^
Discourse Markers used:
['also', 'but', 'first', 'however', 'if', 'may', 'really', 'second', 'so', 'third', 'kind of', 'it is true']
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance in Part of Speech:
Nouns: 0.289256198347 0.261695866417 111% => OK
Verbs: 0.198347107438 0.158904122519 125% => OK
Adjectives: 0.0578512396694 0.0723426182421 80% => OK
Adverbs: 0.0454545454545 0.0435111971325 104% => OK
Pronouns: 0.0330578512397 0.0277247811725 119% => OK
Prepositions: 0.111570247934 0.128828473217 87% => OK
Participles: 0.0413223140496 0.0370669169778 111% => OK
Conjunctions: 2.60075005597 2.5805825403 101% => OK
Infinitives: 0.0206611570248 0.0208969081088 99% => OK
Particles: 0.0 0.00154638098197 0% => OK
Determiners: 0.107438016529 0.128158765124 84% => OK
Modal_auxiliary: 0.0123966942149 0.0158828679856 78% => OK
WH_determiners: 0.0123966942149 0.0114777025283 108% => OK
Vocabulary words and sentences:
No of characters: 1376.0 1645.83664459 84% => OK
No of words: 226.0 271.125827815 83% => More content wanted.
Chars per words: 6.08849557522 6.08160592843 100% => OK
Fourth root words length: 3.87727950738 4.04852973271 96% => OK
words length more than 5 chars: 0.380530973451 0.374372842146 102% => OK
words length more than 6 chars: 0.309734513274 0.287516216867 108% => OK
words length more than 7 chars: 0.221238938053 0.187439937562 118% => OK
words length more than 8 chars: 0.119469026549 0.113142543107 106% => OK
Word Length SD: 2.60075005597 2.5805825403 101% => OK
Unique words: 121.0 145.348785872 83% => More unique words wanted.
Unique words percentage: 0.535398230088 0.539623497131 99% => OK
Word variations: 49.6917523049 53.8517498576 92% => OK
How many sentences: 10.0 13.0529801325 77% => OK
Sentence length: 22.6 21.7502111507 104% => OK
Sentence length SD: 36.2023479902 49.3711431718 73% => OK
Chars per sentence: 137.6 132.220823453 104% => OK
Words per sentence: 22.6 21.7502111507 104% => OK
Discourse Markers: 1.2 0.878197800319 137% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 6.0 3.39072847682 177% => OK
Readability: 53.5734513274 50.5018328374 106% => OK
Elegance: 1.59701492537 1.90840788429 84% => OK
Coherence and Cohesion:
Essay topic to essay body coherence: 0.329540976327 0.549887131256 60% => OK
Sentence sentence coherence: 0.181542803863 0.142949733639 127% => OK
Sentence sentence coherence SD: 0.0884997285047 0.0787303798458 112% => OK
Sentence paragraph coherence: 0.685355216365 0.631733273073 108% => OK
Sentence paragraph coherence SD: 0.111788009846 0.139662658121 80% => OK
Sentence topic coherence: 0.178583442881 0.266732575781 67% => OK
Sentence topic coherence SD: 0.0807489077545 0.103435571967 78% => OK
Paragraph paragraph coherence: 0.390666583933 0.414875509568 94% => OK
Paragraph paragraph coherence SD: 0.0646044018987 0.0530846634433 122% => OK
Paragraph topic coherence: 0.240081423894 0.40443939384 59% => OK
Paragraph topic coherence SD: 0.0619518776267 0.0528353158467 117% => OK
Task Achievement:
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 4.0 4.45695364238 90% => OK
Sentences with neutral sentiment: 2.0 4.26048565121 47% => OK
Positive topic words: 4.0 3.49668874172 114% => OK
Negative topic words: 4.0 3.62251655629 110% => OK
Neutral topic words: 1.0 3.1766004415 31% => OK
Total topic words: 9.0 10.2958057395 87% => OK
What are sentences with positive/Negative/neutral sentiment?
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Rates: 76.6666666667 out of 100
Scores by essay e-grader: 23.0 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.