Cosmic Perspective Fundamentals
Cosmic Perspective Fundamentals
3rd Edition
ISBN: 9780134988504
Author: Bennett, Jeffrey O., Donahue, M. (megan), SCHNEIDER, Nicholas, Voit, Mark
Publisher: Pearson,
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Chapter 13, Problem 20SEQ

Explain all answers clearly, with complete sentences and proper essay structure if needed. An asterisk (*) designates a quantitative problem, for which you should show all your work.

20.Energy from antimatter total annual U.S. power consumption is about 2x1020 joules. Suppose you could supply that energy by combining pure matter with pure antimatter .estimate the total mass of matter antimatter fuel you would need in order to provide the United States with energy for 1 years. how does that mass compare with the amount of matter in your car’s gas tank?( A gallon of gas has a mass of about 4 kilograms.) (Hint: consider the meaning of the formula B=mc2 and use the fact that 1 joule-1KG X m2/s2.)

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ONLY ANSWER 3 AND USE OTHER QUESTIONS FOR CONTEXT   Suppose we have two sources of light, a deep red one with wavelength 700 nm, and a violet one with wavelength 400 nm. Both produce the same optical power, delivering 1 milliwatt (10−310−3 watts) of energy per second per square centimeter to a metal target with an area of 1cm2 located 1 meter from the sources.   1. Which color would deliver more photons each second? All the photoelectrons that are produced from the light are presumed to be collected by another electrode and we determine the current in amperes using a circuit and an "ammeter", that is, some device that can give a precise quantitative measure of the current. Such a device might use the magnetic field generated by the current, or the voltage produced when the current flows across a resistance. 2. If the work function of the surface is 2 eV, will we see a current with both colors, one color, or neither one? If so, how much (in amperes), or if not, explain. 3. If we now…
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