Current is a quantity.

scalar or vector

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

If anyone who can me with this hw? i would really appreciate it