In which reaction is there a transformation of mass into energy

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90

How many neutrons does plutonium -196 with an atomic number of 78.