Amass vibrates back and forth from the free end of an ideal spring of spring constant 20.0 n/m with an amplitude of 0.250 m. what is the maximum kinetic energy of this vibrating mass?

Aand b antarctica is a north pole.  field lines enter earth near the north pole.the magnetic pole near antarctica is a north pole.compasses point toward a magnetic pole that is a north pole.field lines circle earth from east to west.a compass can lead a hiker to the geographic north pole.

He the the the the the the the the 

Using renewable energy sources. just did the test and got it right.

The  moon has  insufficient gravity to retain an  atmosphere. we conclude that the moon has no atmosphere  because its gravitational field is too weak to  have  retained any  atmosphere  that it had over times comparable to the age of the solar system.