The picture below shows a train as it approaches a hill. This train can only make it over the hill if it approaches at it's top speed because it will
lose speed as it climbs. What changes are taking place in the train's
potential and kinetic energy as it climbs the hill?

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!