A balloon which has been rubbed against a person's hair is touched to a wall and remains
attached to it. Which diagram best represents the
charge distribution on the balloon and wall?

Abearing is designed to a reduce friction b. support a load c.guide moving parts such as wheels, shafts and pivots d. all of the above

Why do electron microscopes have higher resolving power than light microscopes?

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z