which statement correctly describes the relationship between a black body radioterapia it’s tmeptaute and the electromagnic radiation it gives off

Need in all of themmm only answer if you know plsssss

Hydrogen and helium are both members of?

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)