Jawabanmu

2014-06-10T12:01:42+07:00
P=W/t
   =300/120 sekon
   = 2,5 watt
2014-06-10T12:03:37+07:00
W=300 j
t= 2mnt =120 detik
p=w/t
  =300/120
 =2.5


maaf kalau salah