a.cahaya - listrik - cahaya
b. nyala lampu akan redup karena sinar matahari terhalang oleh awan
a. Ep = m × g × h
Ep = 50 × 10 × 100
Ep = 500 × 100
Ep = 500.000 J
b.Ek = ½ × m × v²
Ek = ½ × 50 × 30²
Ek = 25 × 900
Ek = 22.500 J
c. Em = Ep + Ek
Em = 500.000 + 22.500
Em = 522.500 J
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nomor 2
a.cahaya - listrik - cahaya
b. nyala lampu akan redup karena sinar matahari terhalang oleh awan
nomor 3
a. Ep = m × g × h
Ep = 50 × 10 × 100
Ep = 500 × 100
Ep = 500.000 J
b.Ek = ½ × m × v²
Ek = ½ × 50 × 30²
Ek = 25 × 900
Ek = 22.500 J
c. Em = Ep + Ek
Em = 500.000 + 22.500
Em = 522.500 J