a red led has the following specification: maximum forward current:50 ma. typical forward voltage: 1.9 v. design, sketch and label a christmas light set using 75 of these leds and an appropriate resistor connected to 120 v, 60hz power source. you need not show all the leds in your sketch. specify the value of the resistor

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

What is the increase in density of a medium due to wave travel?