D. The maximum kinetic energy and maximum potential energy are equal, but occur at different times.
Newton's law is all about motion
Answer:
Distance traveled will be
Explanation:
We have given speed of the light
We have to find the distance traveled by light in 1 year
We know that 1 year = 8760 hour
And 1 hour = 60×60 = 3600 sec
So 1 year
We know that distance = speed × time
So distance traveled by light in one year
We have to fond the distance in km
As we know that 1 km = 1000 m
So
Answer:
electric energy ( power ) = 300000 W
Explanation:
given data
mechanical (hydroelectric) energy = 120 MJ/min = 2000000 J/s
efficiency = 15 % = 0.15
solution
we know that Efficiency of electric engine is expression as
Efficiency = Mechanical energy ÷ electric energy ......................1
and here dam electrical power output is
put here value in equation 1
electric energy ( power ) = Efficiency × Mechanical energy ( power )
electric energy ( power ) = 0.15 × 2000000 J/s
electric energy ( power ) = 300000 W