This is done by dividing the objectâs mass by its volume. The formula for density is: Density = Mass / Volume. This equation can also be written: Ï=m/V. In the formula, Ï is the symbol for density. Scientists measure density in kilograms per cubic metre (kg/m3). m is the symbol for mass. Scientists measure mass in kilograms (kg).
Definition - What does Proof of Concept (POC) mean? A proof of concept (POC) is a demonstration, the purpose of which is to verify that certain concepts or theories have the potential for real-world application. POC is therefore a prototype that is designed to determine feasibility, but does not represent deliverables. Proof of concept is also known as proof of principle.
What is Proof-of-Work? Bitcoin Mining is intentionally designed to be resource-intensive and difficult so that the number of blocks found each day by miners remains steady over time, producing a controlled finite monetary supply. Individual blocks must contain a proof-of-work to be considered valid. This proof-of-work (PoW) is verified by other Bitcoin nodes each time they receive a block. Bitcoin uses a PoW function to protect against double-spending, which also makes Bitcoin's ledger immutable.