Answer:The Atwood Machine is a device that demonstrates the basic principles of acceleration and dynamics. You'll mostly see Atwood machines in Physics laboratories and classrooms. It consists of two objects with different masses that hang vertically from a frictionless pulley that has a very small, negligible mass.
Explanation:
 
        
             
        
        
        
Explanation:
It is given that,
Speed of the baseball, u = 44 m/s
Speed of the baseball, v = 53 m/s
Mass of the ball, m = 145 g = 0.145 kg
Time of contact between the ball and the bat, t = 2.2 ms = 0.0022 s



F₁ = 2900 N...........(1)



F₂ = 3493.18 N.........(2)
In average vector form force is given by :



Hence, this is the required solution.
 
        
             
        
        
        
Answer:
ω2  =  216.47 rad/s
Explanation:
given data 
radius r1 =  460 mm
radius r2 = 46 mm 
ω =  32k rad/s
solution
we know here that power generated by roller that  is 
power = T. ω    ..............1
power = F × r × ω 
and this force of roller on cylinder is equal and opposite force apply by roller 
so power transfer equal in every cylinder so 
( F × r1 × ω1)  ÷ 2 = (  F × r2 × ω2 )  ÷  2    ................2
 so 
ω2  =   
 
ω2  =  216.47 
 
        
             
        
        
        
Answer:
Electron groups could be considered as  Lone pair electrons and bonded pairs of electrons.
Answer: Option D & B
Explanation:
The two or more electrons can be bonded by single bond, double bond, covalent bond of electrons can simply be lone pair of electrons. Unshared pair of electrons are generally termed as lone pair of electrons in an atom which are generally present in the outermost shell of atoms. Hence electron groups can be determined by bonded pairs and lone pairs of electrons.
I got this from another brainly user