3. A chemical symbol designates an element that belongs to the periodic table. A chemical formula combines two or more symbols and it represents a chemical compound.
4.A mixture is made of two or more substances—elements, compounds, or both—that are together in the same place but are not chemically combined. Example: vegetable soup!Mixtures differ from compounds intwo ways: Each substance in a mixturekeeps its individual properties.
5.filtration, evaporation, distillation, chromatography
        
             
        
        
        
Ok so the formula is d=vi(t)+½at² and when you substitute it you should get 172.5meters
        
             
        
        
        
Answer:
Change in specific internal Energy
Explanation:
Given:
- Mass of the gas, m=0.4 lb
- Initial pressure and volume are  
- Final pressure and temperature are  
- Heat transfer from the gas is 2.1 Btu
Since the process is isotropic we have

So the final volume of the gas is calculated.
Work in any isotropic is given by w

According to the first law of thermodynamics we have

So the Specific Internal Change is given by

So the specific Change in Internal energy is calculated.
 
        
             
        
        
        
Answer:
 R= 20 ohm  
Explanation:
Given that
Current ,I = 6 A
Voltage difference ,ΔV = 120 V
Lets take resistance of the stem iron = R
We know that ,the relationship between current ,voltage difference and resistance is given as
ΔV = I R

Now by putting the values in the above equation we get

R= 20 ohm
Therefore the resistance of the steam  will be 20 ohm.