The ball rolled a distance of 
d = 12m + 20m. 
But the change of position is
x = + 12m - 20m
        
             
        
        
        
8/4 = y/y-x
8y - 8x  = 4y
y = 2x
y = 2 x 4
y = 8
Hope this helps
        
             
        
        
        
Lo experiences tidal heating primarily because lo’s elliptical orbit causes the tidal force on lo to vary as it orbits the Jupiter. Thus, lo’s elliptical orbit is essential to its tidal heating. This elliptical orbit, in turn, is an end result of the orbital resonance among lo, Europa and ganymade. This orbital resonance origin lo to have a more elliptical orbit than it would because lo intermittently passes Europa and ganymade in the same orbital position. We cannot perceive tidal forces of tidal heating in lo but rather we foresee that they must occur based on the orbital characteristic of the moons and active volcanoes on lo is the observational evidence that tidal heating is significant in lo.
        
             
        
        
        
Answer:
88.2 C
Explanation:
The current can be defined as the rate of flow of charge in a conductor. 
The relation between charge current and time is given as 
I = Q/T
I = current, Q= charge and T = time
that is ampere = coulomb / second
The amount of charge passed is from the negative to the positive terminal 
shall be given by:
Q = I * t = 3.5mA * 7h * 3600s/h = 88.2 C
Note: take care of the units.  
 
        
             
        
        
        
Answer:The specific heat capacity of water is 4,200 joules per kilogram per degree Celsius (J/kg°C). This means that it takes 4,200 J to raise the temperature of 1 kg of water by 1°C.
Explanation: