a) Estimate the fraction of the electrons in the valence band of intrinsic silicon that can be excited to the conduction band at a temperature of 100 K and at room temperature (293 K). Take the energy gap in silicon to be 1.1 eV. (b) By what factor would the conductivity of a metal change over this same temperature interval

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon

What are fossils of organisms that existed over a wide area but only for a limited time period called?