Answer:
It can lit 4262500 Bulbs
Step-by-step explanation:
Power: This can be defined as the ratio of energy or work done to the time taken to do the work. The S.I unit of power is Watt
Power (P) = mgh/t.................................. Equation 1
P = fall rate × height × acceleration due to gravity............ Equation 2
Where m = mass, h = height, g = acceleration due to gravity
Given: Fall rate = 1.2×10⁶ kg/s, g = 9.8 m/s², h = 29 m
Substituting these values into Equation 2
Power = 1.2×10⁶× 9.8×29
Power = 341.04×10⁶ W
Power = 3.41 × 10⁸ W.
Therefore the total power generated by Niagara fall = 3.41 × 10⁸ W.
But, Number of bulbs it can lit = Total power/power of one bulb
Also Given: power of one bulb = 80 W
Therefore, Number of bulbs = 3.41×10⁸/80
Number of bulbs = 0.042625×10⁸
Number of bulbs = 4262500 Bulbs.
Therefore it can lit 4262500 Bulbs