Answer
given,
mass of base ball = 0.14 kg
speed before it made the contact with the ball (V i) = 42 m/s
speed after batter hit the ball(V f) = - 48 m/s
a)
impulse = change in momentum
=
=
= -12.6 Kg m/s
Magnitude of impulse = 12.6 Kg m/s
b)
Force = 
= 
Force = 2520 N
Explanation:
Acids HCl HNO3 H2SO4
bases All oxides or hydroxides of metals
Answer:
A hypothesis is a basically a theory proposed to a subject or refrence to an act with limited evidences.