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••12 Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 8.70 cm-³, and their speed is 470 km/s. (a) Find the current density of these protons. (b) If Earth's magnetic field did not deflect the protons, what total cur- rent would Earth receive?

••12 Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 8.70 cm-³, and their speed is 470 km/s. (a) Find the current density of these protons. (b) If Earth's magnetic field did not deflect the protons, what total cur- rent would Earth receive?

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Near Earth, the density of protons in the solar wind
(a stream of particles from the Sun) is 8.70 cm–3
, and their speed
is  470 km/s. (a) Find the current density of these protons. (b) If
Earth’s magnetic field did not deflect the protons, what total cur-
rent would Earth receive?

••12 Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 8.70 cm-³, and their speed is 470 km/s. (a) Find the current density of these protons. (b) If Earth's magnetic field did not deflect the protons, what total cur- rent would Earth receive?
Transcribed Image Text:••12 Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 8.70 cm-³, and their speed is 470 km/s. (a) Find the current density of these protons. (b) If Earth's magnetic field did not deflect the protons, what total cur- rent would Earth receive?
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