Usually when we use the term “solar power,” we are referring to indirect energy use: photovoltaic solar panels collect energy from the sun and then either pass it along to a device or store it for later use. But some systems can use power from the sun in…

In theory, a Pirani gauge is a very simple device for measuring the pressure of a gas within a container, as it consists of a heated metal wire that loses heat as the pressure increases internally. With this value now known, the electrical resistance can…