Sound waves are longitudinal waves that is, are transmitted in the same direction of oscillation of the particles in the medium. Electromagnetic waves are transverse ie, the electric and magnetic fields, which are perpendicular to each other, oscillate perpendicularly to the direction of wave propagation.
        
             
        
        
        
Answer: its a reaction
Explanation:
like coke its a reaction between gas and oxygen 
 
        
             
        
        
        
<u>Answer:</u> The molality of solution is 0.740 m.
<u>Explanation:</u>
To calculate the mass of solvent (water), we use the equation:

Volume of water = 750 mL
Density of water = 1 g/mL
Putting values in above equation, we get:

To calculate the molality of solution, we use the equation:

Where,
 = Given mass of solute
 = Given mass of solute  = 100.0 g
 = 100.0 g
 = Molar mass of solute
 = Molar mass of solute  = 180 g/mol
 = 180 g/mol
 = Mass of solvent (water) = 750 g
 = Mass of solvent (water) = 750 g
Putting values in above equation, we get:

Hence, the molality of solution is 0.740 m.
 
        
             
        
        
        
The simple machine used is called atwood machine. 
        
             
        
        
        
Is this multi choice or no?