a book for general physics

i think this book could be quite good because in Taiwan the professor (Chia-Liang Cheng --(president of NDHU)) was using this book to teach freshman students general physics. it is edition 8 and i bought this edition for general physics. if you want to know about this book, you can visit the following link.
http://www.cengage.com/asiahed/instructor.do?disciplinenumber=3080&product_isbn=9781439048757&courseid=PC01&codeid=2C5A&subTab=&mainTab=OtherResources&mailFlag=true&topicName= 

but now i also want to share next edition (edition nine) of this book. here is online pdf version of this ninth edition of this book and you can download from the following link this book.

http://finedrafts.com/files/CUNY/Physics/Physics_for_Scientists_Engineers_Modern%20Physics_9th%20Ed_Serway_Jewett.pdf   -----  pdf version of ninth edition

difference between persons and people

people - ()Nowadays, "people" is almost always the right choice when you are talking about more than one person. Traditionally, "people" was proper when referring to a mass of people.

persons - () "persons" was proper when referring to a distinct number of individuals (e.g., Squiggly noted that eight persons showed up for the book club meeting).

difference between persons and people

Nowadays, "people" is almost always the right choice when you are talking about more than one person.

Some dictionaries don't even include "persons" as the plural of "person" anymore, and the few dictionaries that do include "persons" note that it is uncommon, archaic, or going out of style.

Traditionally, "people" was proper when referring to a mass of people (e.g., Squiggly couldn't believe how many people were at the wrestling match), and "persons" was proper when referring to a distinct number of individuals (e.g., Squiggly noted that eight persons showed up for the book club meeting).

difference between neat and tidy

neat - (Neat normally tends towards "in order or well formed") I don't see any significant difference between these words, only that 'neat' are mostly used in referring to a person while 'tidy' to a thing or place. 
tidy - (Tidy tends towards "not in a mess")I don't see any significant difference between these words, only that 'neat' are mostly used in referring to a person while 'tidy' to a thing or place. 

Who can tell me what's difference between the "neat" and "tidy"

• 'neat' and 'tidy' (you can also include 'clean') are synonymous. 
  
  I don't see any significant difference between these words, only that 'neat' are mostly used in referring to a person while 'tidy' to a thing or place. 
  
  in american english, I think "neat" is more often used rather than "tidy". 
  
  :)

• neat = tidy 
  They are synonyms. They are both used to mean 'in order'and 'carefully done or arranged' 
  
  'I like everything to be neat and tidy.' 
  'Keep your room neat and clean.' 
  'He's a neat person= he likes to keep things tidy and in order.' 
  'You should dress neatly when you appear in public.' 
  
  I want to add an idiom that means 'neat and tidy; done or arranged very accurately or carefully'. It is 'just so': 
  'Her hair is always just so.' 
  'He liked polishing the furniture and making everything just so.'

Who knows the difference between the words "tidy" and "neat''?

• There isn't. They are entirely interchangeable. You would merely use them in different contexts sometimes.
• Actually - none. They are synonyms

• Neat normally tends towards "in order or well formed"
  Tidy tends towards "not in a mess" (by the way "tidy" can also mean "very good" in some areas of the UK.)

difference between pallid and pale

pale - ()PALE refers mostly to someone who is usually healthy looking but for some reason, like sickness or fright, is pale.

pallid - ()PALLID refers to someone who is generally weak-looking without much color. He doesn't have to be sick or frightened like in PALE.

pale vs pallid

(the difference between pale and pallid?)

• Well, they are "near synonyms". They mean almost the exact same thing.
  
  PALE refers mostly to someone who is usually healthy looking but for some reason, like sickness or fright, is pale.
  
  PALLID refers to someone who is generally weak-looking without much color. He doesn't have to be sick or frightened like in PALE.
  
  You would say:
  
  You look PALE. (estas enfermo?)
  but
  He's got a PALLID complexion. (Siempre tiene cara palida y sin color)

• I think there is'nt difference, pale and pallid mean the same thing .Anyway pale means paletto in a different contest bye

difference between "plural nouns with the" and "plural nouns without the"

Can I use "the" with plural form of nouns ?

(Say, "the horses", "the players" and etc..?

And when is it corect?)

• You would say "I like horses," if you like them in general but you would say "I like the horses," if you are referring the specific ones.

• you can use 'the' with plural nouns.
  
  "The green hats don't fit well"
  
  "The Porches are parked in the back"
  
  "Koz macks on alllllll the girls" 
  
  etc. 

• Usage of the definite article "the" in English is the same for plural nouns as it is for singular nouns.