<h3><u>Answer;</u></h3>
1st drop; Motor 
2nd drop; Electricity 
 A device that uses electricity and magnetism to create motion is called a <u>motor</u>. In a reverse process, a device that uses motion and magnesium can be used to create <u>electricity</u>. 
<h3><u>Explanation</u>;</h3>
- <em><u>Motors are device which use electricity and magnetism to create motion.</u></em> They pass alternating current through opposing pairs of magnets to create a rotating magnetic field which creates a magnetic field in the rotor of a motor, making it to spin around. 
- <em><u>Electric motors work in a reverse process by using motion and magnetism to generate electricity. </u></em>When a coil or loops of wire are exposed to a changing magnetic field, an electrical current arises or is induced.
 
        
        
        
Answer:
7.5 m 
Explanation:
 = initial speed of the ball = 8 m/s
 = initial speed of the ball = 8 m/s 
 = angle of launch = 40° deg
 = angle of launch = 40° deg
Consider the motion along the vertical direction :
 = initial velocity along vertical direction =
 = initial velocity along vertical direction =  = 8 Sin40 = 5.14 m/s
 = 8 Sin40 = 5.14 m/s 
 = acceleration along vertical direction = - 9.8 m/s²
 = acceleration along vertical direction = - 9.8 m/s²
 = time of travel
 = time of travel 
 = vertical displacement = - 1 m
 = vertical displacement = - 1 m 
Using the kinematics equation 


 = 1.22 sec
 = 1.22 sec 
Consider the motion along the horizontal direction :
 = initial velocity along horizontal direction =
 = initial velocity along horizontal direction =  = 8 Cos40 = 6.13 m/s
 = 8 Cos40 = 6.13 m/s 
 = acceleration along vertical direction = 0 m/s²
 = acceleration along vertical direction = 0 m/s²
 = time of travel = 1.22 sec
 = time of travel = 1.22 sec
 = horizontal displacement = ?
 = horizontal displacement = ? 
Using the kinematics equation 


 = 7.5 m
 = 7.5 m 
 
        
             
        
        
        
Answer:
A.)
Explanation:
Because you didn't add anything or take anything away.