Which of the following statements correctly compares the frequency and energy of infrared waves and ultraviolet waves? a infrared waves have lower frequencies than ultraviolet waves. since frequency and energy are directly proportional, infrared waves also have less energy than ultraviolet waves. b infrared waves have lower frequencies than ultraviolet waves. since frequency and energy are inversely proportional, infrared waves also have more energy than ultraviolet waves. c infrared waves have higher frequencies than ultraviolet waves. since frequency and energy are directly proportional, infrared waves also have more energy than ultraviolet waves. d infrared waves have higher frequencies than ultraviolet waves. since frequency and energy are inversely proportional, infrared waves also have less energy than ultraviolet waves.

The slotted link is pinned at o, and as a result of rotation it drives the peg p along the horizontal guide. compute the magnitude of the velocity and acceleration of p along the horizontal guide. compute the magnitudes of the velocity and acceleration of p as a function of θ if θ=(3t) rad, where t is measured in seconds.

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 choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon