Answer:
(a) The speed of the target proton after the collision is: , and (b) the speed of the projectile proton after the collision is:
, and (b) the speed of the projectile proton after the collision is:  .
.
Explanation:
We need to apply at the system the conservation of the linear momentum on both directions x and y, and we get for the x axle: , and y axle:
, and y axle: . Now replacing the value given as:
. Now replacing the value given as:  ,
,  for the projectile proton and according to the problem
 for the projectile proton and according to the problem  are perpendicular so
 are perpendicular so  , and assuming that
, and assuming that  , we get for x axle:
, we get for x axle: and y axle:
 and y axle:  , then solving for
, then solving for  , we get:
, we get: and replacing at the first equation we get:
 and replacing at the first equation we get: , now solving for
, now solving for  , we can find the speed of the projectile proton after the collision as:
, we can find the speed of the projectile proton after the collision as: and
 and  , that is the speed of the target proton after the collision.
, that is the speed of the target proton after the collision.
 
        
             
        
        
        
The equation for momentum is p =
mv where p is the omentum, m is the mass and v is the velocity. Calculating the
momentum for each football player, player A will have a momentum of 1050
lb-mi/h and player B will have a momentum of 570 lb-mi/h. Therefore, momentum of player A is greater than that of
player B.
 
        
                    
             
        
        
        
Answer:
Option A
Explanation:
Mechanical waves requires some medium to travel through. They travel faster in the dense medium as compared to a free medium. 
The speed of a mechanical wave is fastest in the solid medium and the slowest in the gaseous medium. Hence, as the wave traverses from gaseous medium to the solid medium, its speed increases. 
Thus, option A is correct
 
        
             
        
        
        
Answer:
12500(kg*m/s)
Explanation:
F=ma=mv/t=p/t
p=F*t=500N*25 s=12500(kg*m/s)