ESSENTIAL COSMIC PERSPECTIVE BUNDLE
ESSENTIAL COSMIC PERSPECTIVE BUNDLE
8th Edition
ISBN: 9780137438013
Author: Bennett
Publisher: PEARSON
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Chapter 11, Problem 30EAP
To determine

To Choose:

The reason why sunspots appear darker than its surroundings. The given options are (a) they are cooler than their surroundings (b) they block some of the sunlight from the photosphere (c) they do not emit any light.

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at a certain location the horizontal component of the earth’s magnetic field is 2.5 x 10^-5 T due north A proton moves eastward with just the right speed so the magnetic force on it balances its weight. Find the speed of the proton.
Example In Canada, the Earth has B = 0.5 mT, pointing north, 70.0° below the horizontal. a) Find the magnetic force on an oxygen ion (O) moving due east at 250 m/s b) Compare the |FB| to |FE| due to Earth's fair- weather electric field (150 V/m downward).
Three charged particles are located at the corners of an equilateral triangle as shown in the figure below (let q = 2.20 µC, and L = 0.810 m). Calculate the total electric force on the 7.00-µC charge.   What is the magnitude , what is the direction?
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