Answer:
5.0 m/s
Explanation:
The horizontal motion of the salmon is uniform, so the horizontal component of the salmon's velocity is constant and it is

where u is the initial speed and  . The horizontal distance travelled by the salmon is
. The horizontal distance travelled by the salmon is

where d = 1.95 m and t is the time needed to reach the final point.
Re-arranging for t,
 (1)
 (1)
Along the vertical direction, the equation of motion is

where:
y = 0.311 m is the final height reached by the salmon
h = 0 is the initial height
 is the vertical component of the initial velocity of the salmon
 is the vertical component of the initial velocity of the salmon
 is the acceleration of gravity
 is the acceleration of gravity
t is the time
Substituting t as found in eq.(1), we get the equation

and we can solve this formula for u, the initial speed of the salmon:

 
        
             
        
        
        
A single magnetic field is shown. 
 
        
             
        
        
        
Не могу понять почему у тебя в ее и я не знаю почему но мне кажется что я в этом смысле жизни и
        
             
        
        
        
Answer:
Explanation:
Force between two charges is given by the following expression
F =  Q₁ and Q₂ are two charges and d is distance between two.
  Q₁ and Q₂ are two charges and d is distance between two. 
.1 = 
If Q₁ becomes three times , force will become 3 times . Hence force becomes .3 N in the first case. 
Force F = .3 N 
If charge becomes one fourth , force also becomes one fourth .
F= 
= .025 N.