An N-type silicon sample has an arsenic dopant density of 1017 cm-3. Determine: a) The temperature at which half the impurity atoms are ionized. (finalize the equation for obtaining the temperature; no need to solve the equation. The same for part b) b) The temperature at which the intrinsic density exceeds the dopant density by a factor of 10. Assume Eg does not change with T. c) Assuming complete ionization, calculate the minority carrier density at 300 K and the location of the Fermi level referred to EC.

Abullet found at a crime scene may be used as evidence in a trial if the percentage of metals match to the composition of metals in a bullet from the suspect's ammunition. a forensic scientist's analysis of the bullet shows that it contains 11.9 g of lead, 0.5 g of tin, and 0.8 b of antimony. what is the percentage of lead metal in the bullet? express your answers to the one's place.

Will give brainliest it is a lab from k12 here is the linkfor each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. type your answer here. (score for question 3: of 5 points) were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. type your answer here. (score for question 4: of 5 points) make a general statement about the reactivity of the metals in this experiment. type your answer here.

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.