Consider a current flowing in wire made of aluminum (with density 2.702 g cm 3 and atomic weight 26.98 u). Assume that each atom contributes 3.5 conduction electrons.
What is the drift speed in a 2.5 mm -diameter aluminum wire carrying 25 A ?

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.

Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.

Idon’t quite understand this problem