D.What is the best angle to throw a ball for maximum distance?  Because this is the only question in above all of them which has some scientific investigation like angle that is use in many of the physics relations.
        
                    
             
        
        
        
Answer:
Efficiency of wedge is the ratio of "work done by the machine to the work supplied to the machine".
            Efficiency (η) = Work done by machine ÷ Work supplied 
                                   = 65 ÷ 75
                                  = 0.86%
<em>Efficiency of wedge is 86%</em>
 
        
             
        
        
        
Electromagnets are used in all kinds of electric devices, including hard disk drives, speakers, motors, and generators, as well as in scrap yards to pick up heavy scrap metal. They're even used in MRI machines, which utilize magnets to take photos of your insides!
 
        
                    
             
        
        
        
Answer:
Tge Rhododendrob is the national flower of Nepal. The hills and mountain sides ranges of Nepal are decorated with diff colours and shapes
 
        
             
        
        
        
Answer:
three properties of intrinsic semiconductor