A machine that spins samples very rapidly to separate elements based on weight is a:

A machine that spins samples very rapidly to separate elements based on weight is a:

• A. Cannula
• B. Centrifuge
• C. Counter
• D. Refractometer

Answer: (B)

The main idea here is using centrifugal force to separate mixture components by density. A centrifuge spins samples at high speed, creating outward force that acts on all components. Heavier or denser parts move more quickly toward the bottom or outer layer, while lighter parts stay higher or toward the center. This is exactly how blood can be separated into plasma and cells, or how urine sediments are collected for analysis in veterinary labs. The other devices don’t perform this kind of separation: a cannula is simply a tube for delivering or removing fluids, a counter tallies items, and a refractometer measures a liquid’s refractive index to estimate concentration but doesn’t physically separate components.

The main idea here is using centrifugal force to separate mixture components by density. A centrifuge spins samples at high speed, creating outward force that acts on all components. Heavier or denser parts move more quickly toward the bottom or outer layer, while lighter parts stay higher or toward the center. This is exactly how blood can be separated into plasma and cells, or how urine sediments are collected for analysis in veterinary labs. The other devices don’t perform this kind of separation: a cannula is simply a tube for delivering or removing fluids, a counter tallies items, and a refractometer measures a liquid’s refractive index to estimate concentration but doesn’t physically separate components.