Résoudre le problème suivant En été, lorsque le thermomètre indique 30 °C, la tour Eiffel est plus grande de 20 cm qu'en hiver, où la structure a tendance à se rétracter. Si à la température de 4°C elle mesure 324,0 m, quel est son coefficient de dilatation linéaire?

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Did the proton move into a region of higher potential or lower potential? did the proton move into a region of higher potential or lower potential? because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of higher potential to a region of lower potential. because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of lower potential to a region of higher potential. because the proton is a positive charge and it slows down as it travels, it must be moving from a region of higher potential to a region of lower potential. because the proton is a positive charge and it slows down as it travels, it must be moving from a region of lower potential to a region of higher potential. request answerpart bwhat was the potential difference that stopped the proton? express your answer with the appropriate units.î”v î” v = nothingnothingrequest answerpart cwhat was the initial kinetic energy of the proton, in electron volts? express your answer in electron volts. ki k i = nothing ev request answerprovide feedback

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?