A string of 20 identical Christmas tree lights are connected in series to a 120 V source. The string dissipates 59 W. (a)One of the bulbs quits burning. The string has a wire that shorts out the bulb filament
when it quits burning, dropping the resistance
of that bulb to zero. All the rest of the bulbs
remain burning
What is the resistance of the light string
now?
Answer in units of N.
(b)How much power is dissipated by the string
now?

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?

Smallest intensity of a stimulus that you can detect 50 percent of the time is