Answer:
Germanium 
Explanation:
Germanium is a chemical element that is grayish white metalliod
 
        
             
        
        
        
Answer:
2s
Explanation:
Given parameters: 
Distance  = 30m 
Speed  = 15m/s 
Unknown: 
Time before Laurence caught it = ? 
Solution: 
To solve this problem; 
     Speed  =  
   
  Time taken  =  =
   =  = 2s
  = 2s 
The time it takes is 2s
 
        
                    
             
        
        
        
Answer:
Maximum height, h = 10 m          
Explanation:
It is given that,
Mass of golf ball, m = 45 g = 0.045 kg
The ball comes down on a tree root and bounces  straight up with an initial speed of 14.0 m/s.
We need to find the height the ball will rise  after the bounce. It is based on the conservation of energy such that,

h is maximum height raised by the ball

So, the ball will raised to a height of 10 meters.
 
        
             
        
        
        
Answer:
Lens at a distance = 7.5 cm
Lens at a distance = 6.86 cm  (Approx)
Explanation:
Given:
Object distance u = 12 cm
a) Focal length = 20 cm
b) Focal length = 16 cm
Computation:
a. 1/v = 1/u + 1/f
1/v = 1/20 + 1/12
v = 7.5 cm
Lens at a distance = 7.5 cm
b.  1/v = 1/u + 1/f
1/v = 1/16 + 1/12
v = 6.86 cm  (Approx)
Lens at a distance = 6.86 cm  (Approx)
 
        
             
        
        
        
Answer:
I believe it is they will weigh the same
Explanation:
Center of gravity is the axis on which the mass rotates evenly if I remember correctly from AP Physics