Box a (m = 2.5 kg) is connected by a rope that passes over a frictionless pulley to box b (m = 5.5 kg), as shown. the coefficient of kinetic friction between the box and the ramp is 0.54. determine the magnitude of the acceleration of the boxes.

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.

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid