Which of the following statements are true about light bulbs? Check ALL that apply. * Incandescent bulbs work by having electrons flow through a wire filament that has a resistance high enough to cause heat and light to be produced.
LED stands for light emitting diodes.
CFL bulbs last the longest of any of the three types of bulbs.
LED bulbs are the least efficient of any of the three types of bulbs.
CFL bulbs are the most dangerous when broken.

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

The amount of potential energy possessed by an elevated object is equal to what?

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.