Why isn't energy ever truly destroyed?

Which sentence from holes contains an implied personality trait? stanley and his parents had tried to pretend that he was just going away to camp for a while, just like rich kids do. he'd just been in the wrong place at the wrong time. stanley felt somewhat dazed as the guard unlocked his handcuffs and led him off the bus. stanley nodded to show he understood

How many neutrons does an element have if its atomic number is 50 and its mass number is 166

What must be in balance for temperatures to remain constant?