A current of 77 mA in a conducting wire of an unknown material is carried by free electrons. The cross-sectional area of the conductor is 1.5×10*-6 m2.Find the density of free electrons in the material if the average speed of the free electrons along the wire is 0.18 mm/s. Use a value of 1.6×10*-19 C for the electron charge.

glen is correct.

step-by-step explanation:

glen is correct because when you multiply 4 * 2 = 8.

and 4 * 3 = 12.

b) 10 minutes

girls stopped for 10 minutes.

a=d/t

a="triangle"v/t

explanation:

a = acceleration

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me