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Contact [7]
3 years ago
11

If the atoms and molecules of a substance are moving very fast, the substance is _________.

Physics
2 answers:
lana66690 [7]3 years ago
5 0
A. hot is the correct answer.
Hope it helps!
Furkat [3]3 years ago
3 0
<span>If the atoms and molecules of a substance are moving very fast, the substance is _________.

a) hot
 The temperature is droping, the movements are slowly
At minus 273 Celsius (0 Kelvin) there is no movement</span>
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After a student shoves a book across a flat table, it begins to slow down. Why?
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Answer:

  • <u>The force of friction opposes the motion of an object, causing moving objects to lose energy and slow down. When objects move through a fluid, such as air or water, the fluid exerts a frictional force on the moving object. The frictional force from a fluid is called a drag force.</u>
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Compare the earths climate today with its climate during an ice age.
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3 years ago
A vessel contains 1 mol of O2 and 2mol of He.what is the value of'Cp/Cv ' of the mixture?
BlackZzzverrR [31]
Oxygen is diatomic, so its degree of freedom, (f1)= 5,
also its number of moles, n1= 1


Helium is monoatomic, so its degree of freedom (f2)= 3 
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Now using formula of effective degree of freedom of mixture, (f), we have: 

f= (f1n1+f2n2)/(n1+n2)
  =  (5*1 + 3*2)/ (1+3)
   =11/3
Also, from first law of thermodynamics;
U= n Cv. T = nRT(f2)
 or, Cv = R. (f/2) (n & T cancel)

We know f=11/6, 
substituting the value in above relation, we have:

Cv= R. 11/3*2
    = R. 11/6

Also, Cp-Cv = R
 or, Cp- R.(11/6)= R
or, Cp= R(11/6 )+1
          = 17/6 R

Therefore, Cp/Cv = 17/11
    




6 0
3 years ago
What are two conditions of equilibrium? write them in word​
valentina_108 [34]
In order for a system to be in equilibrium , two conditions must be met. Net force must be 0.
6 0
3 years ago
This will give brainliest
Troyanec [42]

Answer:

It is likely to be option B: 50 degrees and 50 degrees

Hope it helps.......... pls mark as brainliest.

6 0
3 years ago
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