An incadescent lightbulb has a power of 60 w and an efficiency of 1.7%. a cfl bulb has a power of 18 w and an efficiency of 8.5%. 1. how much energy is used when the incadescent bulb is left on for 12 hours?
2. how much light power does the cfl bulb produce?
3. In 12 hours, how much heat neergy does the incadescent bulb give off?

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

step-by-step explanation:

c

step-by-step explanation: