A fluorescent lamp is 25% efficient. Choose the statement that correctly describes how the lamp performs.

A ) the lamp only works for a quarter of the time
B ) 25% of the electrical energy transferred to the lamp is wasted
C ) the lamp does not work properly
D) 25% of the energy supplied to the lamp is transferred to light

Please answer correctly
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Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f

Aparticle moves in a circle 1.50 m in radius . through what angle in radians does it rotate if it moves through an arc length of 2.50m? what is the angle in degrees?

With physics question #5? for any !