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When something is moving very fast, does it exert a greater gravitational field, in accordance with its new increased mass?

Einstein's work resulted in the production of the atom bomb. Since then, we've started using lasers in consumer devices (lasers use quantum mechanics.) We've also started using new cool materials. But as for subatomic physics--the kind that we're doing in particle accelerators--what have we...

Isn't it true, though, that the fact that heating causing efficiency losses is an artifact of design? That is, we're currently designing solar panels to be most efficient at normal temperatures. What if we designed them to be most efficient at higher temperatures?

No problem, thanks for mentioning it-- We design solar panels to operate most efficiently under the conditions they usually encounter, which is to say, normal conditions on Earth's surface, which don't include heavily concentrated radiation. But say you're using large mirrors to concentrate a...

In what scenarios might concentrated heat (high heat or energy per unit area or per unit volume) increase efficiency in energy production? Maybe it allows for useful sustainable superconduction conditions, or just for the operation of a high-fidelity photovoltaic collector that costs a lot to...

Sure -- I should have included those in my list, as I did already know about them. I'm looking for something more daring. ;)

Many linear quantities have angular counterparts. Mass --> Moment of inertia velocity --> angular velocity acceleration --> angular acceleration force --> torque momentum --> angular momentum E = mc^2 --> ? = I ?^2 Even a loose analogy would do.