Two isolated, concentric, conducting spherical shells have radii r1-0.460 m and r2 = 1.50 m, uniform charges q1 = +1.90 yc and q2 = +2.20 c, and negligible thicknesses. what is the magnitude of the electric field e at radial distance (a) r = 3.10 m, (b) r = 0.840 m, and (c) r = 0.210 m? with v = 0 at infinity, what is vat (d) r= 3.10 m, (e) r = 1.50 m, (f) r = 0.840 m, (g) r = 0.460 m, (h) r- 0.210 m, and (i) r 0? (a) number t3840 (b) numbert 24230 (c) number to (d) numbert o (e) number tto (f) number 1 4495 (9) number61110 (h) number t1190 (i) numbertt

Na food processing facility, a spherical container of inner radius r1 5 40 cm, outer radius r2 5 41 cm, and ther- mal conductivity k 5 1.5 w/m · k is used to store hot water and to keep it at 100°c at all times. to accomplish this, the outer surface of the container is wrapped with a 800-w electric strip heater and then insulated. the temperature of the inner surface of the container is observed to be nearly 120°c at all times. as- suming 10 percent of the heat generated in the heater is lost through the insulation, (a) express the differential equation and the boundary conditions for steady one-dimensional heat conduction through the container, (b) obtain a relation for the variation of temperature in the container material by solving the differential equation, and (c) evaluate the outer surface tempera- ture of the container. also determine how much water at 100°c this tank can supply steadily if the cold water enters at 20°c.

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

What is special about a dc circuit ?