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 half the fuel energy that the internal-combustion powered car does to go the same distance.
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 half the fuel energy that the internal-combustion powered car does to go the same distance.
- 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 engin 76
- TPO17 80
- In an effort to encourage ecologically sustainable forestry practices, an international organization started issuing certifications to wood companies that meet high ecological standards by conserving resources and recycling materials. Companies that recei 3
- Endotherms are animals such as modern birds and mammals that keep their body temperatures constant. For instance, humans are endotherms and maintain an internal temperature of 37°C, no matter whether the environment is warm or cold.Because dinosaurs were 80
- Do you agree or disagree with the following statement? Television advertising directed towards young children (aged two to five) should not be allowed. Use specific reasons and examples to support your answer. 73
Grammar and spelling errors:
Line 1, column 1, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: Car
car manufacturers and governments have been...
^^^
Line 1, column 326, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: Fuel-cell
...ctricity that, in turn, powers the car. fuel-cell engines have several advantages over in...
^^^^^^^^^
Line 5, column 1, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: One
...d will probably soon replace them. one of the main problems with the internal-...
^^^
Line 5, column 141, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: Petroleum
...in the form of gasoline or diesel fuel. petroleum is a finite resource; someday, we will ...
^^^^^^^^^
Line 5, column 275, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: Hydrogen
...cell engines cannot easily be depleted. hydrogen can be derived from various plentiful s...
^^^^^^^^
Line 9, column 86, Rule ID: POSSESIVE_APOSTROPHE[1]
Message: Possible typo: apostrophe is missing. Did you mean 'worlds'' or 'world's'?
Suggestion: worlds'; world's
...ive because they will solve many of the worlds pollution problems. An unavoidable by-p...
^^^^^^
Transition Words or Phrases used:
if, second, so, third, in other words, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 13.0 10.4613686534 124% => OK
Auxiliary verbs: 8.0 5.04856512141 158% => OK
Conjunction : 5.0 7.30242825607 68% => OK
Relative clauses : 5.0 12.0772626932 41% => More relative clauses wanted.
Pronoun: 12.0 22.412803532 54% => OK
Preposition: 24.0 30.3222958057 79% => OK
Nominalization: 10.0 5.01324503311 199% => OK
Performance on vocabulary words:
No of characters: 1465.0 1373.03311258 107% => OK
No of words: 258.0 270.72406181 95% => OK
Chars per words: 5.67829457364 5.08290768461 112% => OK
Fourth root words length: 4.00778971557 4.04702891845 99% => OK
Word Length SD: 3.4805446203 2.5805825403 135% => OK
Unique words: 153.0 145.348785872 105% => OK
Unique words percentage: 0.593023255814 0.540411800872 110% => OK
syllable_count: 468.0 419.366225166 112% => OK
avg_syllables_per_word: 1.8 1.55342163355 116% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 2.0 3.25607064018 61% => OK
Article: 6.0 8.23620309051 73% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 4.0 2.5761589404 155% => OK
Performance on sentences:
How many sentences: 14.0 13.0662251656 107% => OK
Sentence length: 18.0 21.2450331126 85% => The Avg. Sentence Length is relatively short.
Sentence length SD: 39.0570618664 49.2860985944 79% => OK
Chars per sentence: 104.642857143 110.228320801 95% => OK
Words per sentence: 18.4285714286 21.698381199 85% => OK
Discourse Markers: 4.0 7.06452816374 57% => More transition words/phrases wanted.
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 6.0 4.19205298013 143% => OK
Sentences with positive sentiment : 10.0 4.33554083885 231% => Less positive sentences wanted.
Sentences with negative sentiment : 3.0 4.45695364238 67% => 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: 0.536340985805 0.272083759551 197% => OK
Sentence topic coherence: 0.189116314932 0.0996497079465 190% => OK
Sentence topic coherence SD: 0.188498961837 0.0662205650399 285% => The coherence between sentences is low.
Paragraph topic coherence: 0.341700593724 0.162205337803 211% => OK
Paragraph topic coherence SD: 0.268480511428 0.0443174109184 606% => More connections among paragraphs wanted.
Essay readability:
automated_readability_index: 14.5 13.3589403974 109% => OK
flesch_reading_ease: 36.28 53.8541721854 67% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 12.7 11.0289183223 115% => OK
coleman_liau_index: 15.66 12.2367328918 128% => OK
dale_chall_readability_score: 8.69 8.42419426049 103% => OK
difficult_words: 68.0 63.6247240618 107% => OK
linsear_write_formula: 12.0 10.7273730684 112% => OK
gunning_fog: 9.2 10.498013245 88% => OK
text_standard: 9.0 11.2008830022 80% => OK
What are above readability scores?
---------------------
Rates: 76.6666666667 out of 100
Scores by essay e-grader: 23.0 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.