A current of 5A is flowing through a 2mm diameter wire. The drift speed of electrons in the wire is 10-5m/s and the charge on the electron is 1.6*10-19C. Calculate the number of electrons passing a point in the wire. Select one:

a. 9.947*109

b. 9.947*1019

c. 5.67*1030

d. 9.947* 1029​

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c.the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors

Find the equation for the plane through upper p 0 left parenthesis negative 4 comma negative 8 comma negative 5 right parenthesis perpendicular to the following line. xequalsnegative 4 minus t, yequalsnegative 8 plus 2 t, zequals3 t, minusinfinityless thantless thaninfinity