Determine the time it takes for a satellite to orbit the moon in a circular "near-moon" orbit. a "near-moon" orbit is at a height above the surface of the moon that is very small compared to the radius of the moon. [hint: you may take the acceleration due to gravity as essentially the same as that on the surface.]

Whithin which type of system is neither the total mass nor the total energy conserved ? a. open b. connected c. isolated d. closed

The earth's magnetic field, with a magnetic dipole moment of 8.0×1022am2, is generated by currents within the molten iron of the earth's outer core. suppose we model the core current as a 3000-km-diameter current loop made from a 1000-km-diameter “wire.” the loop diameter is measured from the centers of this very fat wire. to decide whether this is a large or a small current density, compare it to the current density of a 7.0 a current in a 2.0-mm-diameter wire.

If it takes ashley 3 seconds to run from the batters box to first base at an average speed of 6.5 meters per second, what is the displacement she covers in that time?