WAEC - Physics (1994 - No. 7)
A tap supplies water at 30°C while another supplies at 86°C. If a man wishes to bath with water at 44°C, calculate the ratio of mass of hot water to that of cold water required
1:3
3:1
3:7
7:3
15:8
คำอธิบาย
\(M_Hc\theta_{H} = M_cc\theta_c\)
\(M_h(86-44) = M_c(44-30)\) thus giving 1:3
\(M_h(86-44) = M_c(44-30)\) thus giving 1:3