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Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

When we are near to getting the actual weight in a beam balance, standard weights should be tried in :

  1. decreasing order

  2. increasing order

  3. either increasing or decreasing order

  4. at random
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When we are near to getting the actual weight in a beam balance, standard weights should be tried in decreasing order.
Meanwhile, let us look at the precautions in using a beam balance: 
1. The weight should be replaced into the weight box after weighing. 
2. Wet and hot objects should not be kept on the plan. 
3. When near the actual weight ,weights should be tried in decreasing order. 
4. The beam should be lowered before adding or removing weights from the pan. 
5. The lever should be turned gently ,in order to prevent the knife edges from chipping.

Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

Objects measured in beam balance should be

  1. hot and wet

  2. hot but not wet

  3. wet but not hot

  4. neither hot nor wet
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

While weighting an object using a beam balance, it should be ensured that the object is neither wet nor hot.
Meanwhile, let us look at all the precautions in using a beam balance: 
1. The weight should be replaced into the weight box after weighing. 
2. Wet and hot objects should not be kept on the plan. 
3. When near the actual weight ,weights should be tried in decreasing order. 
4. The beam should be lowered before adding or removing weights from the pan. 
5. The lever should be turned gently ,in order to prevent the knife edges from chipping.

Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

An object is weighed in the following places using a spring balance. In which place will it weigh the heaviest?

  1. On the Moon

  2. At the equator

  3. At the pole

  4. In outer space
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Acceleration due to gravity $g$ is the largest at the pole of the earth.
Weight of the object $W = mg$
$\implies$ $W\propto g$
Thus the object will weigh the heaviest at the pole of the earth
Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

Burette and Pipette are used to measure mass

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Burette and pipette are the volumetric glassware that are used to measure the volume of liquids (or solutions) mostly in chemistry laboratory. On the other hand mass is the amount of matter in an object which most commonly measured using balance.
Hence, given statement is false.
Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

Which of the following should not be weighed directly in contact with a balance pan?

  1. glass

  2. ceramics

  3. laboratory chemicals

  4. metal objects
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

balance pan can be used to measure the weight of glass, ceramics as well as metal object but it cannot be used to measure the weight of laboratory chemicals directly as the chemicals can react with the base of pan. Also, weight measurement of the chemicals used need to be very accurate, of teh order of milligram as well, which cannot be done with balance pan.

Multiple choice physics measurements and units measuring mass measurement of mass measuring instruments

The weights should be carried with forceps to :

  1. avoid impressing fingerprints on the weights

  2. avoid heat exchange

  3. avoid the change in its weight due to the presence of moisture and dust particles

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The weights should be carried with forceps to avoid the change in its weight due to the presence of moisture and dust particles.