Polyvinylchloride automotive body panels (k = 0.092 w/m\u22c5k, cp = 1.05 kj/kg\u22c5k, \u3c1 = 1714 kg/m3), 1-mm thick, emerge from an injection molder at 120oc. they need to be cooled to 40oc by exposing both sides of the panels to 20oc air before they can be handled. if the convective heat transfer coefficient is 15 w/m2\u22c5k and radiation is not considered, the time that the panels must be exposed to air before they can be handled is (a) 0.8 min (b) 1.6 min (c) 2.4 min (d) 3.1 min (e) 5.6 min

An owl dives toward the ground with a constant velocity of 4.40 m/s at 53.0° below the horizontal. the sun is directly overhead and casts a shadow of the owl directly below it. what is the speed (in m/s) of its shadow on level ground?

Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?

Determine the net charge of the predominant form of arg at (a) ph 1.0, (b) ph 5.0, (c) ph 10.5, and (d) ph 13.5