The resistivity of a semiconductor can be modified by adding different amounts of impurities. a rod of semiconducting material of length l and cross-sectional area a lies along the x-axis between x=0 and x=l. the material obeys ohm's law, and its resistivity varies along the rod according to ? (x)=? 0exp(? x/l). the end of the rod at x=0 is at a potential v0 greater than the end at x=l. find the total resistance of the rod. express your answer in terms of the given quantities and appropriate constants. r = .632l? 0asubmitmy answersgive upcorrectpart bfind the current in the rod. express your answer in terms of the given quantities and appropriate constants. i = v0a? 0l(1? e? 1)submitmy answersgive upcorrectpart cfind the electric-field magnitude e(x) in the rod as a function of x. express your answer in terms of the given quantities and appropriate constants. e(x) = v0e? xll(1? e? 1)submitmy answersgive upcorrectpart dfind the electric potential v(x) in the rod as a function of x. express your answer in terms of the given quantities and appropriate constants. v(x) = v0e? xl? e? 11? e? 1submitmy answersgive upcorrectpart egraph the function ? (x) for values of x between x=0 and x=l. submitmy answersgive upincorrect; try again; 2 attempts remainingpart fgraph the function e(x) for values of x between x=0 and x=l. submitmy answersgive upincorrect; try again; 4 attempts remainingpart ggraph the function v0(x) for values of x between x=0 and x=l.

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

Need asap ! what is the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure? (2 points) as air pressure in an area increases, the density of the gas particles in that area decreases. as air pressure in an area increases, the density of the gas particles in that area increases. as air pressure in an area increases, the density of the gas particles in that area remains constant. as air pressure in an area increases, the density of the gas particles in that area increases and decreases in an alternating pattern. 3. which of the following correctly describes a way in which earth's atmosphere interacts with the geosphere? (2 points) it contains gases that living organisms breathe. it contains gases that trap incoming solar radiation. it provides a medium for cycles that provide nutrients to living organisms. it provides a medium for water to move between earth's surface and the air. 4. which of the following is considered a drawback to using wind energy as a source of power? (2 points) wind energy is nonrenewable. wind energy produces large amounts of air pollution. 5. a meteorologist predicts that the weather in a region will soon change from clear skies to probable thunderstorms. prior to making this prediction, what did the meteorologist most likely observe on a barometer? (2 points) the barometer fell slightly. the barometer fell substantially. the barometer rose slightly. the barometer rose substantially. 6. which of the following do meteorologists not typically use weather balloons to record? (2 points) atmospheric pressure cloud types humidity temperature 7. during which step in the can crush lab did water vapor force air from the can? (2 points) the can was filled nearly to the top with water. the can was placed on the hot stove top burner for several minutes. the can was removed from the hot stove top burner. the can was placed upside-down in the water-filled pan.

Herbivores, carnivores, and omnivores are all types a. decomposers b. producers c. consumers d. biomes