21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 9, Problem 10QP
To determine
Reason behind the formation of Auroras.
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The colorful display of lights in the upper atmosphere seen in higher and lower latitudes are called auroras. What causes them?
a. the response of the earth’s magnetic field to solar flares
b. solar radiation and particles ionize the gas molecules in that portion of the atmosphere
c. the circulation of the earth’s outer core
d. highly energetic particles coming from outer space glow as they enter our atmosphere
5 What is the delta T ?
16. Where does nuclear fusion typically happen In our solar system? Why can’t nuclear fusion be used in power plants yet
Chapter 9 Solutions
21st Century Astronomy
Ch. 9.1 - Prob. 9.1CYUCh. 9.2 - Prob. 9.2CYUCh. 9.3 - Prob. 9.3ACYUCh. 9.3 - Prob. 9.3BCYUCh. 9.4 - Prob. 9.4CYUCh. 9.5 - Prob. 9.5CYUCh. 9 - Prob. 1QPCh. 9 - Prob. 2QPCh. 9 - Prob. 3QPCh. 9 - Prob. 4QP
Ch. 9 - Prob. 5QPCh. 9 - Prob. 6QPCh. 9 - Prob. 7QPCh. 9 - Prob. 8QPCh. 9 - Prob. 9QPCh. 9 - Prob. 10QPCh. 9 - Prob. 11QPCh. 9 - Prob. 12QPCh. 9 - Prob. 13QPCh. 9 - Prob. 14QPCh. 9 - Prob. 15QPCh. 9 - Prob. 16QPCh. 9 - Prob. 17QPCh. 9 - Prob. 18QPCh. 9 - Prob. 19QPCh. 9 - Prob. 20QPCh. 9 - Prob. 21QPCh. 9 - Prob. 22QPCh. 9 - Prob. 23QPCh. 9 - Prob. 24QPCh. 9 - Prob. 25QPCh. 9 - Prob. 26QPCh. 9 - Prob. 27QPCh. 9 - Prob. 28QPCh. 9 - Prob. 29QPCh. 9 - Prob. 30QPCh. 9 - Prob. 31QPCh. 9 - Prob. 32QPCh. 9 - Prob. 33QPCh. 9 - Prob. 34QPCh. 9 - Prob. 35QPCh. 9 - Prob. 36QPCh. 9 - Prob. 37QPCh. 9 - Prob. 38QPCh. 9 - Prob. 39QPCh. 9 - Prob. 40QPCh. 9 - Prob. 41QPCh. 9 - Prob. 42QPCh. 9 - Prob. 43QPCh. 9 - Prob. 44QPCh. 9 - Prob. 45QP
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- 1.) A convection current is caused by differences in temperature resulting to variation in?a. air pressureb.colorc.densityd.mass2.) Scientists believe that the motion of tectonic plates is caused bya. pressure in earth's crustb.conveyor beltsc.convection currentsd.heat in the earth's core3.) It is a measure of how much mass there is in a volume of a subtance.a. volumeb. temperaturec. densityd. mass4.) Hot molten materials in a convection cell rises near thea. outer coreb. crustc. inner cored. mantle5.) The idea that earth's lithosphere is broken up into seperate plates that float on the mantle is the theory ofa. continental driftb. seafloor spreadingc. tectonic movementd. plate tectonics6.) The region in which one plate moves under another isa. rift valleyb. subduction zonec. magma chamberd. vent7.) The motion of gas or liquid caused by differences in temperature is aa. tectonic movementb. plate tectonicc. convection currentd. magma chamber8.) A driving force for plate motion at…arrow_forwardDescribe the process of the formation of charged particles in the atmosphere.arrow_forward4 Determine the albedo flux for an orbit around Earth in Watts/m2, given an altitude of 1,186 kmarrow_forward
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- Earthquakes produce several types of shock waves. The most well-known are the P-waves (P for primary or pressure) and the S-waves (S for secondary or shear). In the earth's crust, the P-waves travel at around 6.5 km/skm/s while the S-waves move at about 3.5 km/skm/s. The actual speeds vary depending on the type of material they are going through. The time delay between the arrival of these two waves at a seismic recording station tells geologists how far away the earthquake occurred. If the time delay is 33 ss, how far from the seismic station did the earthquake occur? Express your answer in kilometers d = __________kmarrow_forwardThe planet Venus is different from the earth in several respects. First, it is only 70% as far from the sun. Second, its thick clouds reflect 77% of all incident sunlight. Finally, its atmosphere is much more opaque to infrared light. Calculate the solar constant at the location of Venus, and estimate what the average surface temperature of Venus would be if it had no atmosphere and did not reflect any sunlight.arrow_forwardWhy would a decrease in the density of the ozone layer cause public health problems?arrow_forward
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