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​

An artificial satellite circles the earth in a circular orbit at a location where the acceleration due to gravity is 6.03 m/s^2. determine the orbital period of the satellite.

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?