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
You might also like to view...
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
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"].
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
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.