Which equation expresses the conservation of mechanical energy in a system that involves kinetic energy, gravitational potential energy, and elastic potential energy?

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?

Which of the following is typically most important to the adolescent when being examined?

There are approximately 1 × 1022 molecules in a single medium-sized breath of air and approximately 1 × 1044 molecules in the atmosphere of the whole world. how many breaths of air are in the world's atmosphere? answer in units of breaths. 006 (part 2 of 2) 10.0 points if all the molecules from julius caesar's last dying breath are now thoroughly mixed in the atmosphere, how many of these on the average do we inhale with each single breath?