What is the difference between Helium3, and Helium?

Porque crees que el agua no podia subir mas de 10 m de altura con ese tipo de bomba

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.

What will a positive and a negative charge do if they are separated from each other?