3. A carpenter uses a crowbar to remove the top of a box. The top has a resistance of 500 N. The
carpenter applies an input force of 250 N. What is the mechanical advantage of the crowbar?
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When does your body conduct current more readily?

Which atomic model was proposed as a result of j. j. thomson’s work?

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?