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Mass balances compare the force of gravity on two masses, while weighing scales use a spring and measure the force of gravity by studying the extension of the spring.

A mass balance would give the same answer on the Moon, while the weighing scales would give an answer about a sixth of the correct value.

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Q: What do mass balances do that weighing scales don't?
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Related questions

How to measure mass?

by using a balance or weighing scales


Why is the symbol for weighing in pounds pound?

The Latin word libra means "scales, balances" and it also describes a Roman unit of mass similar to a pound. This is the origin of the abbreviation "lb".


What is tarring a balance in chemistry?

This is "zeroing" the mass value given by a set of weighing scales, to cancel out the mass of whatever is already on the scales.


What measures mass by comparing the weight of two objects?

Scales or balances


What instrument measures the mass of samples of different chemicals?

Scales and balances.


How do you measure the mass of an object that is irregularly shaped?

You compare its mass with something of known mass. In everyday earthbound conditions, this would mean weighing it on a set of weighing scales or on a spring balance.


What is the best apparatus to weighing mass?

A mass balance. A set of scales where a known mass is put on one side and the mass to be measured put on the other.


What type of balances or scales measure mass?

The type of balances that measure mass is usually the triple beam balance, you move the weights around units almost like the s just the right amount. {its almost like the measuring scales that doctors use to measure your weight, but tinyer!}


What is used to measure a mass of a piece of stone?

To measure the mass of a stone a top pan balance is used


How do you find a total mass of something?

This is usually done by weighing. On Earth, mass and weight are proportional; in fact, balances are usually calibrated for mass units, even if some of them really determine the weight.


How do you calculate mass when density is not known?

you can't unless you have a set of weighing scales mass = density * volume density is needed to work out mass if you have volume if you worked out the mass then you could divide it by volume to get density


What is the best metric unit for measuring mass?

In physics, mass is usually measured in kilograms. Metric weighing-scales will usually display mass in kilograms, so this is a likely choice for the measurement of a person's mass.