The components of an electronic system dissipating 180 w are located in a 1.4- m-long horizontal duct whose cross section is 20 cm × 20 cm. the components in the duct are cooled by forced air that enters the duct at 30°c and 1 atm at a rate of 0.6 m3/min and leaves at 40°c. determine the rate of heat transfer from the outer surfaces of the duct to the ambient.

Write a function that draws a pool ball. this function should take as parameters, the color, the number that should go on the pool ball, and the location of the center of the pool ball. the radius of the pool balls should be pool_ball_radius, and the font of the number should be pool_ball_font. the text of the pool ball font should be white. drawpoolball(color.orange, 5, 100, 100); drawpoolball(color.green, 6, 50, 200); drawpoolball(color.red, 3, 150, 350); drawpoolball(color.blue, 2, 250, 140); to center the numbers on the pool ball, you should use the getwidth() and getheight() methods. you are allowed to call these methods on your text object, such as txt.

Assume that there is a 4% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on three independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

Hazel has just finished adding pictures to her holiday newsletter. she decides to crop an image. what is cropping an image?