"You have the solution book? Isn't that cheating?" Carlos (smiling): "It is if you just copy. It's studying if you use it to find your mistake."
Elena showed him her notebook. The steps were correct, but Carlos spotted the error: she had used the proton's mass in grams (from an old table) instead of kilograms—a factor of ( 10^{-3} ) that ruined everything. ---- Solucionario Fisica 2 Bachillerato Sm Savia
"Still stuck?" Elena: "I've done it five times. I don't know where I'm wrong." Carlos: "Show me your process." "You have the solution book
He pulled up a PDF on his tablet. It was the . ---- Solucionario Fisica 2 Bachillerato Sm Savia
"You need to check your answer, but not just the final number. You need to see where you slipped."