A A ball of mass 3kg tied to the end of
Cord 4m long is made to rotate un-formly in
a horizontal Circle making one complete circie
in 6. 28 see. Determine the acceleration and
the tension on the cord.​

Aprotein molecule in an electrophoresis gel has a negative charge.the exact charge depends on the ph of the solution, but 30 excesselectrons is typical. what is the magnitude of the electric forceon a protein with this charge in a 1500 n/c electric field?