I have a room that I want to add 1000w per hour of heat energy to
I have the options of:
- burning 1050W of gas per hour
- running a 1000W theoretically lossless electric resistive heater per hour
- running a 600W heat pump per hour
Sure, the gas is combusting, the resistive is radiating, and the pump is moving the heat, but functionally they’re all trying to add that 1000W to the room continually for an hour. One of them is doing it a whole lot more efficiently.
Depends.
They’re gps guided 155mm artillery rounds. The electronics and guidance in them reliably survive the 50,000 g-force hell of being shot out of a cannon and then land (when used correctly) within a meter or 2 of their intended target over the course of a 20+km distance.
God knows how much was invested over the years to develop the system, and even once that’s recovered there is still an impressive amount of high precision manufacturing required to make a single one.
I’m positive they’re probably making $30k+ per round, but if it does its job is it worth it?