Which of the following is true about nuclear fusion in stars?

a
When hydrogen atoms merge to form helium atoms, the helium atoms have slightly less mass than the hydrogen atoms that combined to make them
b
When helium atoms split apart to form hydrogen atoms, the hydrogen atoms have slightly less mass than the helium atoms that split apart to make them
c
When helium atoms split apart to form hydrogen atoms, the hydrogen atoms have slightly more mass than the helium atoms that split apart to make them
d
When hydrogen atoms merge to form helium atoms, the helium atoms have slightly more mass than the hydrogen atoms that combined to make them

d

When hydrogen atoms merge to form helium atoms, the helium atoms have slightly more mass than the hydrogen atoms that combined to make them.

So, when I sharpen a blade with some girth behind the cutting edge, they turn out scary sharp. But when I try to sharpen a realy thin blade, they turn out just so so. I still get them pretty sharp, they'll slice paper and shave okay, but they don't clean shave like a thicker blade will when I'm done with it.I suspect this is for 2 reasons. First, the bevel is so tiny that it's harder to keep it consistent. And second, it's almost like the edge is rolling, no matter what I do to try to avoid it. Like the edge is so thin that it just rolls on the strop. I can't really feel any burrs though, so I am at a loss and ready to give up on really thin blades.I use the same process for both types of blades, but they turn out quite different.

Explanation:

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