Nuclear fusion is a reaction in which two or more atomic nuclei come very close and then collide at a very high speed and join to form a new nucleus. This process is important to stars because they get their energy from the nuclear fusion process
 
        
             
        
        
        
Answer: 2.04 s
Explanation: 
Let the initial velocity be v, Angle of projectile be 
Then the horizontal component = v cos θ = 16 m/s
Vertical component of velocity = v sin θ = 20 m/s
Time taken to reach the highest point is half the time taken for total flight.
Time for total flight,


Thus, the football takes 2.04 s to rise to the highest point of its trajectory.
 
        
             
        
        
        
Answer
given,
before collision
mass of car A = m_a = 1300 kg
velocity of car A = v_a  = 35 mph
mass of car B = m_b= 1000 kg
velocity of car B = v_b  = 25 mph
after collision 
V_a = 30 mph
V_b = 31.5 mph
Initial momentum



final momentum



here  initial momentum is equal to the final momentum of the car.
hence, momentum is conserved in the collision.
 
        
             
        
        
        
Balanced. They’re equally as strong so as their arm wrestling, neither of the men’s hands go down. Because they’re equally/balanced as strong.