A skater with moment of inertia 4kgm^2 is spinning with 2rev/sec with her hands and one foot extended when she pulls her hands and foot inwards she can spin with 4rev/sec. what is the moment of inertia of the skater with her hands and foot pulled inwards?

It won't lose or gain electrons if it's a covalent bond it shares the electrons with another atom or atoms. if it is an ionic bond it will lose the 3 electrons on the outer shell and become a positively charged ion.  credit goes to @sunshinebaby of answers.yahoo.com.

Ithink it is letter b, i may be wrong but i think that is the answer

When seismic waves hit a fault, the waves are reflected off the fault. seismograph can detect these reflected seismic waves. geologists then use these data to map the fault's length and depth

Answerit increases at a steady rate;