Mrs. adams' class decides to try an experiment. she rubs a blown up balloon on sandy's head. after this, she takes the balloon and places it on the side of the wall, where it sticks, instead of falling to the ground. also, sandy's hair is now sticking almost straight out. what is the reason the balloon is now sticking to the wall? a) the balloon has a static electric charge from rubbing sandy's hair. b) the wall has been electrically charged and so attracts the balloon. c) the balloon lost its static electric charge by rubbing sandy's hair. d) the balloon would have stuck to the wall whether or not it was rubbed on sandy's hair.

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.

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

The government has declared that a hurricane is likely to hit the east coast. which government division is part of acf and provides guidance to citizens? a. job opportunities for low-income individuals b. office of human services emergency preparedness and response c. assets for independence d. low-income home energy assistance program