Answer:
Explanation:
a) Power consumption is 4100 J/min / 60 s/min = 68.3 W(atts)
work done raised the potential energy
b) 75(9.8)(1000) / (3(3600)) = 68.055555... 68.1 W
c) efficiency is 68.1 / 68.3 = 0.99593... or nearly 100%
Not a very likely scenario.
B. is the answer.
C is not correct because the light is actually reflected off of an opaque object.
So the answer is B. because the mass have Kg as a international unit and velocity is m/s, they are international units in physics.
Planck's constant. A physical constant adopted in 2011 by the CGPM.
