Matthew and Isabel are measuring the weight of washers for a lab at school. What are they really are measuring and what unit should they used to record their answers with. ( i need this quick, please and thank you)

If you wanted to move an electron from the positive to the negative terminal of the battery, how much work w would you need to do on the electron? enter your answer numerically in joules.

If state law mandates that elevators cannot accelerate more than 2.40 m/s2 or travel faster than 14.8 m/s , what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor? ?

Identify the type of heat transfer occurring when chocolate melts in your hand