The wheel, rotating at uniformly accelerated speed, after a time t = 1 min after the start of rotation, acquires a frequency of n = 720 rpm. Find the angular acceleration ɛ of the wheel and the number of revolutions N of the wheel during this time.

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

it is b. absorbs thermal energy