The semiconductor industry manufactures integrated circuits in large vacuum chambers where the pressure is 1.0×10−10mm of hg.
(a) what fraction is this of atmospheric pressure? express your answer using two significant figures.
(b) at t = 10 ∘c, how many molecules are in a cylindrical chamber 50 cm in diameter and 50 cm tall?

We will use a video to study faraday’s law of electromagnetic induction by analyzing the induction that occurs due a coil of copper wire sliding along an air track that passes through an external magnetic field. specifically, we will: examine some of the main principles behind faraday’s law. apply lenz’s law to determine the direction of the induced emf. take measurements of the induced emf from the voltmeter as the coil passes into and out of the external magnetic field. use the horizontal scale provided to determine the speed of the coil. calculate the magnetic field induced in the coil as it passes into and out of the external magnetic field.