Answer
given,
y(x,t)= 2.20 mm cos[( 7.02 rad/m )x+( 743 rad/s )t]
length of the rope = 1.33 m
mass of the rope = 3.31 g
comparing the given equation from the general wave equation
y(x,t)= A cos[k x+ω t]
A is amplitude 
now on comparing
a) Amplitude  = 2.20 mm
b) frequency = 
      
      
            f = 118.25 Hz
c) wavelength 
         
         
         
         
d) speed 
          
          
                 v = 105.84 m/s
e) direction of the motion will be in negative x-direction
f) tension
   
   
       T = 27.87 N
g) Power transmitted by the wave
   
   
        P = 0.438 W
 
        
             
        
        
        
Answer:
angular velocity(ω) is the rate change of angular displacement.
ω=θ/t and it SI unit is rad/s
Explanation:
this is very similar with the definition of linear velocity (rate of change of displacement). it specifies the angular speed of an object and the axis about which the object is rotating.
 
        
             
        
        
        
P = m*v
7.5 = m*15
m = 7.5/15 = 0.5 kg
        
                    
             
        
        
        
Answer:
Protons, Electrons, and neutrons 
 
        
                    
             
        
        
        
A set of two forces that are in opposite directions, have equal magnitudes and act on different objects