Identify the type of error in A and C, explain how it occurs, and state the mass of a person on the moon if their mass on Earth is 78 kg, providing a reason.

Here are the solutions to your questions. QUESTION 5 i) What type of error has occurred in points A and C? The type of error that has occurred in points A and C is a parallax error. This error happens when the observer's eye is not positioned directly perpendicular to the scale being read. The type of error is Parallax error. ii) How does it occur? Parallax error occurs when the line of sight of the observer is not at a right angle to the scale marking. When viewed from an angle (like A or C), the pointer appears to be at a different position on the scale than its actual reading (B), leading to an inaccurate measurement. QUESTION 6 i) If a person's mass is 78 \, kg on Earth. What will be his mass on the moon? Mass is a measure of the amount of matter in an object and does not change with location or gravitational force. Therefore, the person's mass on the Moon will be the same as on Earth. His mass on the moon will be 78 kg. ii) Give a reason for your answer above (i). Mass is an intrinsic property of an object, representing the amount of matter it contains. It remains constant regardless of the gravitational field or location. Weight, however, changes with gravity. QUESTION 7 Name these fixed points. A scale and unit of temperature are obtained by choosing two temperatures called fixed points. These fixed points are used to calibrate the scale. The two fixed points are: i) The melting point of ice (or freezing point of water) ii) The boiling point of water