Answer:
the pressure in the pipe in the case when there is no net force on the car is  81,726 N/m^2
Explanation:
a. The computation of the pressure in the pipe in the case when there is no net force on the car is shown below
As we know that 
Pressure = F ÷ area
Also 
F = mg
Now 
= (1500 × 9.8) ÷π (0.24)^2
= 81,726 N/m^2
Hence, the pressure in the pipe in the case when there is no net force on the car is  81,726 N/m^2
 
        
             
        
        
        
Answer:

Explanation:
Hello,
In this case, the molar enthalpy of reaction is obtained by dividing the involved energy by the reacting moles:

Thus, it is important to notice that the compound "uses" the energy, it means that it absorbs the energy, for that reason the sign is positive. Moreover, computing the result in kJ/mol we finally obtain:

Best regards.
 
        
             
        
        
        
It will be the Displacement method
        
             
        
        
        
Answer:
silicon
Explanation:
Silicon. Silicon is often found in electronic devices, as well as the sand.
hope this helps UwU
 
        
                    
             
        
        
        
At 50 degrees Celsius and standard pressure inter-molecular forces of attraction are strongest in a sample of ethanoic acid. 
Ethanoic acid has hydrogen atom bonded with a more electronegative atom; Oxygen. As a result, the molecule possesses strong intermolecular Hydrogen Bonds. Therefore; ethanoic acid, and all other carboxyllic acids have the tendency to form dimers.