I 2.1.2 Discuss: Defining Distance and Displacement

1. You often hear people, particularly TV announcers, talk about a "high rate of

speed." What do you think they mean? According to the specifics of physics

definitions, what are they really saying?

2. What other "science" words do you hear getting thrown around in general

conversation? Do you think these words are being used in the precise way that

scientists use them?

3. What kinds of difficulties do you foresee when scientists and non-scientists try

to communicate?

BIUS TI

SE

What happens to the light rays when they hit the specimen?

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 of the following statements is true about women and minorities in early psychology? a. in the early 20th century, numerous graduate schools recruited women and minorities to study psychology. b. opportunities in higher education were limited for women and minorities in the early 20th century due to discrimination. c. despite some obstacles, there were numerous employment opportunities for women and minorities. d. women and minorities were often selected to do academic research in an effort to make the field more diverse.