6091 Physics Chapter 1 Measurements

Which pair of units both measure the same quantity?

• km and mm

• N and kg

• J and N

• s and m

Which instrument is used to measure directly the circumference of a golf ball?

• calipers
• micrometer
• rule
• tape

The time taken for a pendulum to swing from position X to its position Y of maximum displacement is 1.5 s. How many complete periods of the pendulum are there in one minute?

• 5

• 10

• 20

• 40

The bob of a simple pendulum is pulled to one side and then released. The motion during its swing is shown on the graph. What is the value of the period of the pendulum?

• 0.5 s

• 1.0 s

• 1.5 s

• 2.0 s

What is the correct order of magnitude for the diameter of the Earth and for the diameter of an atom?

• diameter of Earth = 10 Gm, diameter of atom = 0.1 micrometer
• diameter of Earth = 10 Gm, diameter of atom = 0.1 nm
• diameter of Earth = 10 Mm, diameter of atom = 0.1 nm
• diameter of Earth = 10 Mm, diameter of atom = 0.1 micrometer

A pendulum swings backwards and forwards passing through Y, the middle point of the oscillation. The first time the pendulum passes through Y, a stopwatch is started. The twenty-first time the pendulum passes through Y, the stopwatch is stopped. The reading on the stopwatch is T. What is the period of the pendulum?

• T/40
• T/21
• T/20
• T/10

What is the order of magnitude of the diameter of a human hair?

• 10 to the power of -8 metres
• 10 to the power of -6 metres
• 10 to the power of -4 metres
• 10 to the power of -2 metres

A length of copper pipe, of uniform cross-section and several metres long, carries water to a tap. Measurements are taken to determine accurately the volume of copper in the pipe. Which instruments are used?

• micrometer and rule
• micrometer and digital calipers
• rule and tape
• tape and digital calipers

Which quantity is a base quantity?

• charge
• energy
• force
• temperature

A pipe has an approximate length of 60 cm and an approximate internal diameter of 3 cm. Which instruments are the most suitable for measuring accurately the internal diameter and the length?

• calipers and micrometer
• calipers and rule
• rule and micrometer
• rule and tape