Measurements

A teacher asks a pupil to measure the width of the science laboratory table. Which one of the following instruments should he choose?

• A measuring tape

• A pair of dividers

• A pair of external calipers

• A 30-centimeter ruler

Two marbles of equal diameters were arranged on a meter ruleas shown in the figure. The diameter of one marble is __________.

• 0.6 cm

• 1.2 cm

• 2.7

• 3.3 cm

A student carries out an experiment to determine the mass of paraffin oil in a beaker. The readings obtained from the experiment are as follows:

Mass of empty beaker = 45.3 g

Mass of beaker + paraffin oil = 115.3 g

What is the mass of the paraffin oil?

• 45.3 g

• 115.3 g

• 70.0 g

• 160.6 g

The normal body temperature of a person is?

• 98.4°C

• 36.6°C

• 37.0°C

• 26.9°C

Aminah wants to measure 75 cm³ of water. Which of the following will she use?

• Beaker

• Gas jar

• Conical flask

• Measuring cylinder

The figure shows an experiment to find the volume of an irregular-shaped object. The volume of the object can be determined by the formula:

• V¹ + V²

• V¹ - V²

• V² - V¹

• V¹ x V²

Four identical marbles are put into the measuring cylinder as shown in Figure. The volume of each marble is __________.

• 0.2 cm³

• 2.0 cm³

• 2.5 cm³

• 8.0 cm³

An external calipers can be used to measure the external diameter of a tube as shown in figure below. What is the diameter of the tube?

• 1.5 cm

• 2.0 cm

• 3.5 cm

• 15.0 cm

An object sinks in water. It follows that the density of the object __________.

• is more than that of water.

• is less than that of water.

• is equal to that of water.

• is not possible to determine.

Find the density of kerosene if 60 cm³ of kerosene weighs 48 g.

• 1.0 g/cm³

• 12.0 g/cm³

• 0.8 g/cm³

• 6.0 g/cm³