If the earth-sun distance were doubled, the intensity of radiation from the sun that reaches the earth's surface would if the earth-sun distance were doubled, the intensity of radiation from the sun that reaches the earth's surface would

a. quadruple.
b. double.
c. drop to 14.
d. drop to 12.

Why does the input force have to be greater than the force needed to lift the bale?

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.

Which governments provide garbage collection services to homes and businesses