Which object will NOT allow an electric current to flow through it?

A)
copper wire

B)
an iron nail

C)
a rubber eraser

D)
an aluminum key

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Coal contains energy. a. light b. kinetic c. chemical d. mechanical

Acyclotron is used to produce a beam of high-energy deuterons that then collide with a target to produce radioactive isotopes for a medical procedure. deuterons are nuclei of deuterium, an isotope of hydrogen, consisting of one neutron and one proton, with total mass 3.34×10−27kg. the deuterons exit the cyclotron with a kinetic energy of 6.40 mev .a-what is the speed of the deuterons when they exit? b-if the magnetic field inside the cyclotron is 1.25 t, what is the diameter of the deuterons' largest orbit, just before they exit? c-if the beam current is 350 μa how many deuterons strike the target each second?