Suppose an electron orbits a stationary proton at'a radius of 5.3 X 10" m. What speed must the electron
have if its mass times its centripetal acceleration is to be
equal to the electrostatic force of attraction between the
electron and the proton?

The center is basically the heart of it

The radiation of the fire causes the saucepan to heat up. the conduction of the saucepan then to distribute the heat over the saucepan and to give heat to the water. the convection of the water distributing the heat within the water, till all the water is boiling

The answer is as follows in the photo