Explain why atoms have no electrical charge even though they are made up of charged particles

An aluminum nail has an excess charge of +6.4 µC. How many electrons must be added to the nail to make it electrically neutral? 5.0 × 10-14 4.0 × 101⁹ 3.2 x 1016 4.0 × 1013 O 3.2 x 106

You can give a rubber rod a negative charge by rubbing the rod with wool. What happens to the charge of the wool? The wool becomes neutrally charged because it gives up electrons to the rubber rod. The wool becomes negatively charged because it gives up electrons to the rubber rod. The wool becomes positively charged because it gives up electrons to the rubber rod.

In 1910 Rutherford performed a classic experiment in which he directed a beam of alpha particles at a thin gold foil. He unexpectedly observed a few of the particles scattered almost directly backward. This result was not consistent with then current models of atomic structure and led Rutherford to propose the existence of a very dense concentration of positive charge at the center of an atom-the atomic nucleus. The alpha particle has a charge of +2e and the gold nucleus a charge of +79e. Suppose that an alpha particle is initially How close will at a gold nucleus. a great distance from the gold, has a kinetic energy of 3.97 MeV (3.97 x 106 eV), and is headed directly the particle come to the center of the nucleus? Treat the nucleus and the alpha particle as point charges.

Why is the charge inside a conductor 0 if there is no external electric field? Please be detailed in terms of electrons/electric fields.

Three balls, with charges of +4q, -2q, and -q, are equally spaced along a line. The spacing between neighboring balls is r. We can arrange the balls in three different ways, as shown in the figure. In each case, the balls are in an isolated region of space very far from anything else. Treat the balls as point charges. +4q 1 211 311 (b) Using q 1: 2: 3: -29 = +4q -29 +4q (a) Rank the arrangements according to their potential energy, from most positive to most negative. See if you can do this without explicitly calculating the potential energy in each case. (Use only ">" or "=" symbols. Do not include any parentheses around the letters or symbols.) 3>1>2 J -29 1 3.50 x 10-6 C and r = 50.0 cm, calculate the electrostatic potential energy in each of the cases above.

An amoeba has 1.00 x 1016 protons and a net charge of 0.300 pC.  Assuming there are 1.88 x 106 fewer electrons than protons, If you paired them up, what fraction of the protons would have no electrons?

Two point charges are 4 cm apart. They are moved to a new separation of 2 cm. By what factor does the resulting mutual force between them change? A 1/2 В 2 c) 1/4 2

Two balloons (m = 0.022 kg) are separated by a distance of d = 12 m. They are released from rest and observed to have an instantaneous acceleration of a = 1.1 m/s2 toward each other at the moment they are released. Assume the two balloons are point charges and have equal but opposite charges. Part (a)  Calculate the magnitude of the charge on each balloon in C.  Part (b)  How many electrons are responsible for the charge, N?

A certain lightning bolt moves 40 C of charge. How many fundamental units of charge is this? Think & Prepare: What is the magnitude of the fundamental unit of charge? Answer: ✔fundamental units of charge