Question

give 2 applications of Archimedes' principle and verify it experimentally

Answer 1

Answer:

Two main applications of Archimedes' principle are as follows:

1. Archimedes' principle used in hydrometer to find the density of a liquid
2. Archimedes' principle used in lactometer to find the purity of milk

Hydrometer:

A hydrometer is a device use to measure density of a liquid and this device based on Archimedes’ principle of buoyancy. It is composed of a sealed glass bulb with a long skinny tube connected to one end, and it is weighted with mercury or lead shot under the bulb so it can float upright. The tube portion is labeled with a scale so when it is placed in a liquid, the measured specific gravity can be seen. The instrument is typically calibrated for use with liquid at a certain temperature, and the scale on it can vary depending on its intended use.

Since the density of a liquid generally changes with temperature, a hydrometer is typically calibrated to be used with liquid at a particular temperature. Generally, a hydrometer was calibrated to measure specific gravity using the density of water at 4° C, because at this point pure water reaches maximum density. The calibration of the device will usually be labeled on the neck of the tube, and the liquid sample should be at the calibration temperature when the measurement is taken.

Lactometer:

Lactometer measure the relative density of milk. Addition of water in milk reduces the density of milk.