A handheld sewing machine uses a battery to make a needle move. The needle goes up and down quickly. Which energy change is taking place?
Motion changes to chemical energy,
Stored energy changes to motion
Electricity changes to stored energy
Heat changes to electricity

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

What is an example of a physical property?

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.