Apoint charge q1 = -5.7 μc is located at the center of a thick conducting spherical shell of inner radius a = 7.4 cm and outer radius b = 11.5 cm. the conducting spherical shell has a net charge of q2 = 2.6 μc. a) draw the electric field lines inside the inner radius, between the inner and outer radius, and exterior to the conducting shell. b) what is the magnitude of the electric field at a location 8.0 cm from the point charge? c) what is the electric field at the point θ = 45o , r = 13 cm?

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Chapter 23, problem 075 the figure shows a geiger counter, a device used to detect ionizing radiation (radiation that causes ionization of atoms). the counter consists of a thin, positively charged central wire surrounded by a concentric, circular, conducting cylindrical shell with an equal negative charge. thus, a strong radial electric field is set up inside the shell. the shell contains a low-pressure inert gas. a particle of radiation entering the device through the shell wall ionizes a few of the gas atoms. the resulting free electrons (e) are drawn to the positive wire. however, the electric field is so intense that, between collisions with gas atoms, the free electrons gain energy sufficient to ionize these atoms also. more free electrons are thereby created, and the process is repeated until the electrons reach the wire. the resulting "avalanche" of electrons is collected by the wire, generating a signal that is used to record the passage of the original particle of radiation. suppose the radius of the central wire is 24 âµm, the inner radius of the shell 2.3 cm, and the length of the shell 14 cm. if the electric field at the shell's inner wall is 2.8 ă— 104 n/c, what is the total positive charge on the central wire?

How many atoms of nitrogen are in the chemical formula ni(w on