Today I learned that the device used for weighing people at home is called ‘bathroom scale’ because it is kept in a bathroom in the U.S..

Graduated cylinders are manufactured in sizes ranging from 5 mL to 2000 mL. As with beakers and flasks, graduated cylinders are available in either glass or plastic; glass is easier to clean, but more fragile and expensive than plastic.

A graduated cylinder is meant to be read with the surface of the liquid at eye level, where the center of the meniscus shows the measurement line. Typical capacities of graduated cylinders are from 10 mL to 1000 mL.

In common usage, the mass of an object is often referred to as its weight, though these are in fact different concepts and quantities. In scientific contexts, mass is the amount of “matter” in an object (though “matter” may be difficult to define), whereas weight is the force exerted on an object by gravity.

Scales and balances are both weighing machines. However, the critical difference is that a scale measures weight while a balance measures mass. Weight is the force of gravity on an object measured using a scale.

These are also known as mass scales, weight scales, mass balances, weight balances.

A 2013 study found that digital scales were more accurate than traditional dial scales. However, one downside of digital scales is that they require batteries, whereas analog scales do not need a power source.

The best smart bathroom scales to buy today

• Tanita RD 953. The best body monitor scale for most users.
• Fitbit Aria 2. Best scale for Fitbit users.
• FitTrack Beebo. Sleek and accurate body monitor.
• Salter Compact Digital Bathroom Scales.
• Withings Body Cardio.
• Omron BF511.
• Tanita BC 1500 Ironman.
• Garmin Index Smart Scale.