Question

Which of the following tools should a scientist use to measure an object in milligrams? a.Electronic balance b.Pan balance .c.Tape measure d.Thermometer

Answer 1

Answer:

c. Tape measure.

Explanation:

Here in this case we have to measure the length of the object ( distance) so we need to use tape measure.

Tape measure is a device used to measure small distances. It consists of ribbon of clothes, plastic , fiber.  glass or metal strip with linear measurement markings. rest all options do not measure length.

Answer 2

Answer:

electronic balance

Explanation:

Milligram is the unit to measure the mass. It is the very small unit of mass.

1 mg = 0.001 g

To measure the mass which has the order of milligram, we choose electronic balance. It is to be measured accurately by using the electronic balance.