Which modification, if made to a dam, would allow it to adjust energy production based on the current demands on the grid?
Constructing a pumped storage reservoir.
Building a fish ladder
Dredging sediment from the bottom of a reservoir

it would be heredity

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.

energy per photon is e = h*c / λ  

e = 6.63*10^-34 * 3*10^8 / 6*10^-7 j = 3.315*10^-19 j  

nr. of photons = 10j / 3.315*10 = ^-19 j per photon = 3.02*10^19 photons