TV Or Not TV?

There's so much about TV I don't understand.

On "Star Trek" the Enterprise gets attacked and after two hits, their shields are down to 43%. But seven hits later, their shields are at 39%. WTH??

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"Clark Kent" is supposed to be Superboy/Superman's secret identity. So how come everybody in Smallville knows who he is? Not much of a secret, I'd say.

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You watch some cop show and there's a guy on top of a building across the street with a scoped rifle, and he can't hit the broad side of a barn. But our hero, the cop, takes him out with one shot from a snub-nosed .38 revolver.

I don't get it.