As per Newton's III law we can say that
Force applied by object 1 on object 2 is always equal in magnitude and opposite in direction of the force that object 2 apply on object 1.
So we can say it as

now here above question is based upon the same
if a bag of vegetables applied a force F = 22.5 N of the surface stand the the same surface will apply same magnitude of force in opposite direction on the vegetables bag
So our answer will be F = 22.5 N (upwards).
 
        
             
        
        
        
All electromagnetic waves travel in vacuum (space) at the speed of light (3 * 10^8 m/s). Radio waves is just a member of the electromagnetic spectrum. All electromagnetic waves follow the wave equation: speed = frequency * wavelength. With all electromagnetic waves, the speed in space is the same.
        
             
        
        
        
Answer:
Highly doubt something that requires great focus and mental strength exists
 
        
             
        
        
        
Speed = distance/time
Speed = 50/5
Speed = 10m/s
        
                    
             
        
        
        
Answer:
The process is given in the pic. 
I have taken the average masses so u substitute the values and solve hope it will help :)❤