Select the correct answer. Which wave characteristic has the unit hertz?
A. period
B. phase
C. amplitude
D. frequency

Which situation will have the highest resistance? a.long wire and high temperatureb.short wire and high temperaturec.long wire and cold temperaturedshort wire and low temperature

Which atomic model was proposed as a result of j. j. thomson’s work?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.