Answer:
Explanation:
Far point = 17 cm . That means he can not see beyond this distance .
He wants to see at an object at 65 cm away . That means object placed at 65 has image at 17 cm by concave lens . Using lens formula 
1 / v - 1 / u = 1 / f 
1 / - 17 - 1 / - 65 = 1 / f 
= 1 / 65 - 1 / 17 
= -  .0434 = 1 / f 
power = - 100 / f 
= - 100 x .0434 
= - 4.34 D . 
 
        
             
        
        
        
#8 positive kinetic energy
        
             
        
        
        
Answer:
Circuit 1 and Circuit 3
Explanation:
If there is 1 Circuit and it runs out of energy, there's another one to produce the power.
 
        
             
        
        
        
The correct answer is
Air resistance
In fact, when a ball is in free fall, there are two forces acting on it:
- its weight (force of gravity), acting downward
- the air resistance, acting upward
The effect of the weight is to accelerate the ball, because its direction is the same as the direction of motion of the ball, while the effect of the air resistance is to slow down the ball, because its direction is opposite to that of the motion.