If the substance is in liquid form, the pH may be determined by litmus paper.
Electrical Conductivity.
A pH indicator will test a substance to determine the alkali or acidity, with 7 being neutral on the pH scale.
Substance, classified as an element and compound. For an element, it cannot be separated into another simplier substance; for a compound, it can be dicomposed into elements using chemical processes.
When a substance moves from an area of low concentration to an area of high concentration while using energy the process is called active transport.
A shorthand representation of the composition of a substance using atomic symbols and numerical subscripts is called a chemical formula.
Electrical Conductivity.
The pH of a substance can be found by using a litmus indicator.
Atoms are too small to count and there are too many of them.
The quantity of a substance separated by gas chromatography can be determined by its?
A device called a power inverter.In old vacuum tube radios an electromechanical device called a vibrator was used.Another device is a motor-generator using a DC motor and an AC generator.
Using a device called a duck hook pole
They are both passive devices. An active device is a device that uses semiconductors (or tubes) to process signals instead of using the natural processes of capacitance, inductance or resistance.
tendons
By using a device called manometers.
I am determined not to answer your question.
input device
Yes; solid state rectifiers were made using values (also called vacuum tubes). ************************************************************* A solid state device is a semiconductor device. A valve (vacuum tube) is a thermionic device, so yes, rectification can be achieved with a thermionic rectifier.