Mohon bantuannya kak, pleasee:(​

Jawaban:

1.

Jumlah kalor dibutuhkan Q abc = Q diserap es + Q diserap es melebur  

Qes = mcΔT = 1*2100*(0-(-5)) = 10500 J

Qes melebur = mL = 1*340000 = 340000 J

Q abc = 10500 + 340000 = 350500 J

2.

Wb = mg = 40*10 = 400

Wb lb = Fk lk

400*0,5 = Fk 1,5

200/1,5 = Fk

133,33 N = Fk

Penjelasan: