An electron is moving in the vicinity of a long, straight wire that lies along the 3-axis. The wire has a constant current of 8.90 A in the -2-direction. At an instant when the electron is at point (0, 0.200 m, 0) and the electron 's velocity is ů = (5.00 x 104 m/s)i –(3.00 x 104 m/s)j. Part A What is the force that the wire exerts on the electron? Enter the x, y, and z components of the force separated by commas. Part B Calculate the magnitude of this force. Express your answer with the appropriate units. ?

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)