The following diagram, not drawn to scale, represents the heating curve for a certain substance. Point A represents t = 0 minutes where the substance is a solid. 3.1 Define the term melting point. (2) Use the information in the diagram to answer the following questions 3.2 Write down: 3.2.1 Between which two letters is … Read more
A van is travelling at a constant speed of 54 km.h-1 in a straight and level roadwhere the speed limit is 40 km.h-1. 3.1 Define the term acceleration. (2) 3.2 Convert 54 km.h-1 to m.s-1. (3) A policeman starts his car from rest just as the van passes him. The police caraccelerates uniformly at 2 … Read more
Choose ONE of the following topics and write a short text. The body of your response should be between 80 and 100 words in length. Write down the NUMBER and the HEADING of the text you have chosen,e.g. 3.1 ADVERTISEMENT. Spend approximately 30 minutes on this section. 3.1 ADVERTISEMENT Your school has a garden project. … Read more
3.1 The boiling points in the table below were obtained during an investigation carried out to compare the boiling points of group 7 hydrides. The hydrides, HCℓ and HBr, are labelled in the table as compounds A and B respectively. 3.1.1 Define the term boiling point. (2) 3.1.2 In what phase are compounds (A and … Read more
A 250 N force is applied on a block of mass 25 kg. The 25 kg block is connected to a 10 kg block by a light inextensible string through a frictionless pulley as shown on the diagram below. The 250 N force acts at an angle of 25 o to the horizontal so that … Read more
3.1 Jona buys a sand pit for his 4-year-old daughter, Jaimee, and puts it in his backyard. Below is a diagram of the sandpit with dimensions. Refer to the diagram of the sandpit to answer the questions below. 3.1.1 Jona finds a space to put the sandpit, but he only considers the perimeter of the … Read more