Answer:
a)3312 x 10⁴ J
b)I = 57.5 A
c)9200 W
Explanation:
Given that
P =4600 W
Time t= 2 h = 2 x 3600 s= 7200 s
We know that
1 W = 1 J/s 
a)
Energy stored in the battery = P .t
                                               =4600 x 7200 J 
                                              =3312 x 10⁴ J
b)
We know that power P given as
P = V .I
V=Voltage  ,I =Current
4600 = 80 x I
I = 57.5 A
c)
The energy supplied = 4600 x 2 = 9200 W
 
        
             
        
        
        
Here, K.E. = 1/2 * mv²
So, K.E. = 1/2 * (1200) * (24)²
K.E. = 1/2 * 1200 * 576
K.E. = 600 * 576
K.E. = 345,600 J
Hope this helps!
        
             
        
        
        
Answer:
i dont know but ill update you
 
        
             
        
        
        
Answer:
X: Use DC
Y: Use AC
Explanation:
The objects: Wall clock, T V remote control, Portable music player, are normally powered by batteries, which run DC current.
On the other hand, the objects: Refrigerator, Table lamp, Hair dryer, demand much larger power, and are normally run from the AC plug on the wall.