Near the surface of the planet, the Earth's magnetic field is about 0.50 × 10?4 T. How much energy is stored in 1.0 m3 of the atmosphere because of this field?

What will be an ideal response?


9.9 × 10?4 J

Physics & Space Science

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An object moves with speed vx = +0.9 in the Home Frame. In an Other Frame moving at ? = 0.60 relative to the Home Frame, the object’s x-velocity v?x is

A. v?x = 1.5 B. 1 < v?x < 1.5 C. 0.9 < v?x < 1 D. 0.3 < v?x < 0.9 E. v?x < 0.3 F. v?x < 0

Physics & Space Science

What aspect of Kepler's theory would have horrified all astronomers before Kepler?

A) Kepler's elliptical orbits. B) The fact that the Earth has a spherical shape in Kepler's theory. C) Kepler's simple circular orbits. D) The fact that Earth was no longer at the center. E) The absence of any epicycles [or "circles-within-circles"].

Physics & Space Science

While a car travels around a circular track at constant speed, its

A) acceleration is zero. B) velocity is zero. C) both of these D) none of the above

Physics & Space Science

The Big Bang

A) took place within space. B) marked the beginning of space and time. C) occurred as a result of disturbances within the Large Magellenic cloud. D) took place within time.

Physics & Space Science