Answer:
Multiply the air pressure by the area of the tabletop. 
Explanation:
The relationship between pressure, force and area is given by:

where in this case, p is the air pressure, F is the force exerted and A the area of the tabletop. By re-arranging the equation, we can solve for F, the force exerted:

So, the correct answer is:
The force exerted on the tabletop can be found by multiplying the air pressure by the area of the tabletop.
 
        
             
        
        
        
Answer:
emf induced is 0.005445 V and direction is clockwise because we can see area is decrease and so that flux also decrease so using right hand rule direction of current here clockwise 
Explanation:
Given data
initial circumference = 165 cm
rate = 12.0 cm/s 
magnitude = 0.500 T
tome = 9 sec 
to find out 
emf induced and direction
solution
we know emf in loop is - d∅/dt    ........1
here ∅ = ( BAcosθ)
so we say angle is zero degree and magnetic filed is uniform here so that
emf = - d ( BAcos0) /dt
emf = - B dA /dt     ..............2
so  area will be
dA/dt = d(πr²) / dt
dA/dt = 2πr dr/dt
we know 2πr = c, 
r = c/2π = 165 / 2π
r  = 26.27 cm
c is circumference so from equation 2 
emf = - B 2πr dr/dt    ................3
and 
here we find rate of change of radius that is 
dr/dt = 12/2π = 1.91   cm/s
cm/s 
so when 9.0s have passed that radius of coil = 26.27 - 191 (9) 
radius = 9.08  cm
 cm
so now from equation 3 we find emf
emf = - (0.500 )  2π(9.08  )   1.91
 )   1.91  
emf = - 0.005445 
and magnitude of emf = 0.005445 V
so 
emf induced is 0.005445 V and direction is clockwise because we can see area is decrease and so that flux also decrease so using right hand rule direction of current here clockwise 
 
        
             
        
        
        
Answer:
Zero (0)
Explanation:
A horizontal line will be no movement of negative of positive acceleration
 
        
                    
             
        
        
        
The answer to your question is true