What is the mass number, symbol, and charge of an ion that contains 35 protons, 45 neutrons and 36 electrons?

What are the differences and similarities of a compression wave and a transverse wave?

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?