Along cylindrical wood log (k = 0.17 w/m·k and α = 1.28 × 10−7 m2/s) is 10 cm in diameter and is initially at a uniform temperature of 25°c. it is exposed to hot gases at 525°c in a fireplace with a heat transfer coefficient of 13.6 w/m2·k on the surface. if the ignition temperature of the wood is 375°c, determine how long it will be before the log ignites. solve this problem using the analytical one-term approximation method.

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.