1st question;

A storage tank at STF' contains 28.9 kg of nitrogen {N2}. What is the pressure it an additional 34.8 kg of nitrogen is added without changing the temperature? A coaxial cable consists of a solid center conducting wire and an outer coaxial cylindrical conductor. The space between the conductors and the outer insulation are made of a good insulating material e.g. neoprene. The figure below shows a cross section of such a cable. The current in the center wire is 2.44 A out of the page and the current in the outer conductor is 4.21 A into the page. If the distance a is 2.00 mm, determine the following. 2a- -3a- (a) the magnitude and direction of the magnetic field at the point P, magnitude T direction vertically upward toward the top of the page (b) the magnitude and direction of the magnetic field at the point P2 magnitude direction vertically downward toward the bottom of the page