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 9, Problem 11QQ

Choose the best answer to each of the following. Explain your reasoning.

Which of these star clusters is youngest? (a) a cluster whose brightest main-sequence stars are white (b) a cluster whose brightest stars are red (c) a cluster containing stars of all colors

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A cube has sides of length L = 0.800 m . It is placed with one corner at the origin as shown in the figure. The electric field is not uniform but is given by E→=αxi^+βzk^, where  α=−3.90 and β= 7.10. What is the sum of the flux through the surface S5 and S6?  What is the sum of the flux through the surface S2 and S4? Find the total electric charge inside the cube.
In the figure, a proton is projected horizontally midway between two parallel plates that are separated by 0.6 cm. The electrical field due to the plates has magnitude 450000 N/C between the plates away from the edges.  If the plates are 3 cm long, find the minimum speed of the proton if it just misses the lower plate as it emerges from the field.
A point charge of magnitude q is at the center of a cube with sides of length L. What is the electric flux Φ through each of the six faces of the cube? What would be the flux Φ1 through a face of the cube if its sides were of length L1? Please explain everything.
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