For each calculation, round your answer to nearest whole number.
What is the efficacy of a 60.0 W incandescent lightbulb that produces 830 lumens?
lm/W
What is the power of a CFL lightbulb that produces 825 lumens if its efficacy is 63.5 lm/W?
W
How many lumens does a 11.0 W LED lightbulb exhibit if its efficacy is 72.7 Im/W?
lumens

B) as the temperature increases, the kinetic energy of the particles increases.|-/

Velocity=total displacement/timefrom house to store is 500 from store to neighbor is 200 therefore total displacement=500+200=700metrestherefore,700metres/910seconds=0.8metres per second

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j