Question

Ajutatima la problema 4 dau 25 PUNCTE

Answer 1

$Q_p=\mid Q_c \mid\\Q_p=mc(t_2-t_1)\\\mid Q_c \mid=m_{pacura}q\\mc(t_2-t_1)=m_{pacura}q\\\implies m_{pacura}=\frac{mc(t_2-t_1)}{q}\\m_{pacura}=\frac{400\cdot 9000J/grad\cdot 1000grade}{40000000J/kg}=9kg$