Jasper and gemma are going to play on a teeter totter. gemma gets on first. when jasper gets on, gemma moves into the air, but she does not move to the top. which statement could correctly explain the forces acting on the teeter totter? the forces are balanced because jasper weighs the same as gemma.  the forces are unbalanced because jasper weighs the same as gemma.  the forces are balanced because jasper weighs more than gemma.  the forces are unbalanced because jasper weighs more than gemma. 

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)