Newton's 3rd law: The ball exerts a force on the bat that is equal and opposite to the force exerted by the bat on the ball.
        
                    
             
        
        
        
Answer:
magnitude of the magnetic field 0.692 T 
Explanation:
given data 
rectangular dimensions = 2.80 cm by 3.20 cm
angle of 30.0°
produce a flux Ф = 3.10 ×  Wb
  Wb
solution
we take here rectangular side a and b as a = 2.80 cm and b = 3.20 cm 
and here angle between magnitude field and area will be ∅ = 90 - 30 
∅ = 60° 
and flux  is express as
flux Ф =  .................1
   .................1
and Ф = BA cos∅    ............2
so B =  
    
and we know 
A = ab
so 
B =  ..............3
    ..............3
put here value 
B =   
   
solve we get 
B = 0.692 T 
 
        
             
        
        
        
Answer:
 T = 0.017s
Explanation:
period is the time it takes a particle to make one oscillation
 An electric current is periodic in nature
The current reaches 3.8A  ten times.  
So there must have been 10 cycles (10 periods) in 0.17s.   let 'T'  be the period:

t is the total time interval
n is the number of oscillations

10T = 0.17
T = 0.17/10 = 0.017s
 
        
             
        
        
        
Answer:
1.10m/s
2.0.1m
3.5Hz
Explanation:
v=velocity, f=frequency and T=wavelength
1.v=ft
 v=2x5
 =10m
2.v=ft
 100=1000T
 divide both sides by 1000
 T=0.1m
3.v=fT
 25=5f
 divide both sides by 5
 f=5Hz