Conceptual questions about the work-energy theorem. reminder: if your explanation doesn't include a fact, equation, or calculation, it is wrong. you must answer in three sentences or fewer, though equations and diagrams may be used as well (a) an object is attached to a spring. in case a, the spring is compressed by 1 cm. in case b, the spring is compressed by 2 cm. by what factor is the energy stored in the spring greater in case b? a 2-kg object accelerates as a net force acts on it. during the 5 seconds this force acts, the object changes its velocity from 3 m/s east to 7 m/s west 3 ms- seconds later: - 7 m/s a student states: "the change in kinetic energy of this object during these 5 seconds was 40 j, and thus the work done on this object by the net force during this period was also 40 j." what, if anything, is wrong with this statement? if something is wrong, identify it, and explain how to correct it. if this statement is correct, explain why.

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

Which transition by an electron will release the greatest amount of energy? oa ob oc od

Which of these metals are magnetic?