A block with mass ma = 10.0 kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass me = 4.0 kg which hangs vertically. (Figure 1). if initially ma is at rest 1.250m from the edge of the table, how long does it take to reach edge of table if system is allowed to move freely. ​

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th

If element x has 99 protons how many electrons does it have