Solution Found!
Solved: Solar Magnetic Energy. Magnetic fields within a
Chapter 30, Problem 47P(choose chapter or problem)
Problem 47P
Solar Magnetic Energy. Magnetic fields within a sunspot can be as strong as 0.4 T. (By comparison, the earth’s magnetic field is about 1/10,000 as strong.) Sunspots can be as large as 25,000 km in radius. The material in a sunspot has a density of about 3 × 10-4 kg/m3. Assume µ for the sunspot material is µ0. If 100% of the magnetic-field energy stored in a sunspot could be used to eject the sunspot’s material away from the sun’s surface, at what speed would that material be ejected? Compare to the sun’s escape speed, which is about 6 × 105 m/s. (Hint: Calculate the kinetic energy the magnetic field could supply to 1 m3 of sunspot material.)
Questions & Answers
QUESTION:
Problem 47P
Solar Magnetic Energy. Magnetic fields within a sunspot can be as strong as 0.4 T. (By comparison, the earth’s magnetic field is about 1/10,000 as strong.) Sunspots can be as large as 25,000 km in radius. The material in a sunspot has a density of about 3 × 10-4 kg/m3. Assume µ for the sunspot material is µ0. If 100% of the magnetic-field energy stored in a sunspot could be used to eject the sunspot’s material away from the sun’s surface, at what speed would that material be ejected? Compare to the sun’s escape speed, which is about 6 × 105 m/s. (Hint: Calculate the kinetic energy the magnetic field could supply to 1 m3 of sunspot material.)
ANSWER:
Problem 47P
Solution 47P
Step 1 :
Introduction
We need to find the speed of the object material ejected by the sun spot
Data given
Magnetic field of sunspot
Density of the material
Escape velocity of sun